{"title":"Weight Collars","description":"\u003ch2\u003eFreediving Neck Weights and ballast weights\u003c\/h2\u003e\n\u003cp\u003eThe neck weight is one of the most important technical tools in a freediver’s equipment. Positioned around the neck, it affects weight distribution in the upper body, where buoyancy is more pronounced due to residual air in the lungs and the volume of the neoprene wetsuit. Proper balance in this area helps maintain a more stable horizontal trim and reduces the muscular effort required to correct posture during glide and ascent phases.\u003c\/p\u003e\n\u003cp\u003eThis category includes the full range of \u003cstrong\u003ecomplete neck weights \u003c\/strong\u003eready for use\u003cstrong\u003e, structural bases \u003c\/strong\u003eto be paired with \u003cstrong\u003evariable-weight segments, inserts, and replacement straps. \u003c\/strong\u003eThe products cover every level of use: from beginner freedivers approaching their first pool sessions to advanced freedivers working on precise trim in dynamic or static apnea. \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct types\u003c\/h2\u003e\n\u003cp\u003eWithin the category, there are different types of ballast weights, each with distinct construction features.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete modular neck weights.\u003c\/strong\u003e These are the most popular solution among intermediate and advanced freedivers. They consist of a load-bearing structure—the base—and a variable number of additional weight segments that are interchangeable and removable. This system allows the total ballast to be calibrated by adding or removing individual weights without replacing the entire neck weight. The Lobster neck weights in the 2.5 kg and 4 kg versions, the C4 Deep \u0026amp; Dynamic neck weights in 1.6 kg, 3 kg, and 4 kg, and the C4 Dyno 4 kg neck weight fall into this category.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFixed or semi-fixed neck weight.\u003c\/strong\u003e The Mares 2.4 kg neck weight is made of 300 gr segments connected to each other on a Cordura strap with a quick-release buckle. It allows the load to be adjusted directly in the pool, making it suitable for instructors who need to adjust student weights during sessions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCordura neck weights with compartments.\u003c\/strong\u003e The Best Divers freediving neck weight uses a Cordura fabric structure with fixed and expandable compartments, filled with nickel-plated lead shot that reduces oxide formation. Its elongated shape is designed to shift the weight’s center of gravity from the neck toward the rear of the chest, reducing pressure on the cervical area.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeck weight bases and separate segments.\u003c\/strong\u003e Lobster bases for 2.5 kg and 4 kg neck weights, Lobster Squid 800 gr bases, and Lobster and C4 segments allow the components of the ballast system to be purchased or renewed separately. Lobster segments are available in different weights (100 gr, 200 gr, 300 gr, 400 gr, 500 gr) and multiple colors. C4 offers complete 1.4 kg segment kits as well as individual 280 gr and 1kg segments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplementary accessories.\u003c\/strong\u003e The category includes the Mares Cordura strap for securing the neck weight, Best Divers Cordura weight pouches (available in three weight variants), neck weight carry bags, and Lobster rubber inserts, used to secure and stabilize the weights inside Lobster neck weights.\u003c\/p\u003e\n\u003ch2\u003eMaterials and technical features\u003c\/h2\u003e\n\u003cp\u003eThe materials used in the products in this category reflect specific requirements for durability, comfort, and adaptability to the marine environment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLead Weight and nickel-plated lead shot.\u003c\/strong\u003e The internal core of the neck weights is made of lead, a high-density material that allows the product size to remain compact while maintaining the required weight. Best Divers uses nickel-plated lead shot which, thanks to the nickel coating, offers greater corrosion resistance than raw lead, reducing oxide formation over time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInjection-molded thermorubber (C4 Dyno).\u003c\/strong\u003e The outer covering of the C4 Dyno neck weight is made of thermorubber using an injection-molding process. This production method allows for a thicker coating material compared to traditional processes, resulting in greater resistance to mechanical abrasion. The thermorubber surface keeps the neck weight in position on the wetsuit without slipping during movement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCordura.\u003c\/strong\u003e Cordura fabric is a high-tenacity technical nylon material, abrasion- and water-resistant, used for closure straps and weight pouches. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eScrew assembly system (C4 Dyno).\u003c\/strong\u003e The C4 Dyno neck weight features a screw-based assembly and disassembly system that allows weight segments to be added or removed securely. \u003c\/p\u003e\n\u003ch2\u003eHow to choose a neck weight\u003c\/h2\u003e\n\u003cp\u003eThe choice of a neck ballast system depends on two main factors: discipline and wetsuit thickness.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDiscipline practiced:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIn \u003cstrong\u003edynamic apnea\u003c\/strong\u003e in the pool, the neck weight is especially useful for correcting the tendency of the upper body to float, promoting a horizontal posture that reduces hydrodynamic drag.\u003c\/li\u003e\n\u003cli\u003eIn \u003cstrong\u003estatic apnea\u003c\/strong\u003e, the neck weight helps maintain a relaxed position without the need to continuously contract the neck and shoulder muscles.\u003c\/li\u003e\n\u003cli\u003eIn \u003cstrong\u003edeep freediving\u003c\/strong\u003e at sea, use of the neck weight is more selective and is integrated with traditional belt weights.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWetsuit worn.\u003c\/strong\u003e The thickness and volume of the neoprene wetsuit determine the amount of positive buoyancy to compensate for. A 5 mm or 7 mm wetsuit generates significant buoyancy in the chest area; a 1.5 mm or 3 mm wetsuit requires less neck ballast. The optimal weight should always be tested in the water before finalizing the configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFixed or modular system.\u003c\/strong\u003e Modular segment systems—such as Lobster and C4 neck weights—allow the ballast to be adjusted over time without purchasing a new neck weight. This makes them the most flexible choice for those who want to adapt the load to different wetsuits or different training phases. Fixed or semi-fixed systems such as the Mares Neck Weight are quicker to adjust and particularly suitable for pool use or training environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTotal system weight.\u003c\/strong\u003e The range in this category covers everything from a few grams (50 gr or 100 gr inserts for micro-adjustments) up to 4 kg for complete neck weights. Most pool freedivers work with loads between 1 and 3 kg; those practicing freediving with thick wetsuits or in the sea may need heavier configurations.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eAvailable brands\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eLobster\u003c\/strong\u003e is the brand with the widest range in this category on Deep Blue. It offers complete neck weights in Lobster 4 kg and Lobster 2.5 kg versions in multiple colors, the 1.3 kg Squid neck weight in its complete version and an 800 gr base version, as well as an extensive range of interchangeable segments in five weights (100 gr, 200 gr, 300 gr, 400 gr, 500 gr) and rubber inserts. The availability of individual components makes the Lobster system easy to expand and customize over time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eC4\u003c\/strong\u003e offers two complete neck weight lines: the Deep \u0026amp; Dynamic (D\u0026amp;D), available in three weight configurations (1.6 kg, 3 kg, and 4 kg) and in black and white colorways, and the 4 kg Dyno with an injection-molded thermorubber coating. It also offers individual segments and separate D\u0026amp;D segment kits to integrate neck weights already owned.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMares\u003c\/strong\u003e is present with the 2.4 kg Neck Weight, a modular system with 300 gr segments on a Cordura strap with quick release, and with the Cordura strap as a separate accessory.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBest Divers\u003c\/strong\u003e offers its Cordura freediving neck weight with fixed and expandable compartments and nickel-plated lead shot, in the 1 kg base version (with 2 × 500 gr fixed weights) expandable up to 3 kg through additional pockets, and the Cordura weight pouch available in three weights.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eConclusion\u003c\/h2\u003e\n\u003cp\u003eDeep Blue’s freediving ballast weights category covers the full range of needs related to neck ballast in freediving: from entry-level systems such as Best Divers neck weights to advanced technical solutions from Lobster and C4, through to integration and replacement accessories. The availability of separate components—bases, segments, inserts, straps—allows you to build or progressively update your system without replacing the entire neck weight. The choice of the most suitable product depends on the discipline practiced, wetsuit thickness, and preferred configuration type, whether modular or quick-release.\u003c\/p\u003e","products":[{"product_id":"collare-apnea-best-divers","title":"Freediving Neck Weight","description":"\u003ch2\u003eBest Divers Freediving Neck Weight\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBest Divers Freediving Neck Weight\u003c\/strong\u003e is designed to optimize trim during freediving, transferring the center of gravity from the neck to the upper rear section of the lungs. Its elongated shape reduces load on the cervical area, improving balance and helping achieve a more stable, natural trim in the water.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical features and materials\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMade with high-quality materials: \u003cstrong\u003eoriginal Cordura\u003c\/strong\u003e outer shell for mechanical strength and durability, padded interior with \u003cstrong\u003eAirnet Spacer Plus\u003c\/strong\u003e, a water-repellent material that ensures comfort and breathability.\u003c\/li\u003e\n  \u003cli\u003eTwo shaped weighted wings, filled with \u003cstrong\u003enickel-plated lead shot\u003c\/strong\u003e to prevent oxidation, keep the neck weight from rotating and ensure stability during the dive.\u003c\/li\u003e\n  \u003cli\u003eThe initial fixed weight is 1 kg, expandable with two reinforced pockets to add up to 2 kg more in 250-gram increments.\u003c\/li\u003e\n  \u003cli\u003eThe maximum achievable weight is therefore 3 kg, customizable according to the ideal weighting of the freediver or spearfisher.\u003c\/li\u003e\n  \u003cli\u003eLead shot available separately in 250 g, 500 g, and 1 kg sizes to fine-tune the neck weight to your trim.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAdjustment and closure\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThe Velcro closure allows quick release, essential for safety in the water.\u003c\/li\u003e\n  \u003cli\u003eThe size is adjustable from 38 to 48 cm, ensuring a precise and comfortable fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable colors\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRed\u003c\/li\u003e\n  \u003cli\u003eBlack\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Best Divers","offers":[{"title":"Black","offer_id":56925452894553,"sku":"APN1000N","price":98.5,"currency_code":"EUR","in_stock":true},{"title":"Red","offer_id":56925452927321,"sku":"APN1000","price":98.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/Collare_Apnea.png?v=1782075870"},{"product_id":"sacchetto-di-zavorra-in-cordura-best-divers","title":"Cordura Weight Pouch","description":"\u003ch2\u003eWeighted Cordura Pouch for Freediving Neck Weight\u003c\/h2\u003e\n\u003cp\u003eThe freediving neck weight pouch is made of \u003cstrong\u003eCordura\u003c\/strong\u003e, a highly durable and water-resistant material, ideal for underwater use in spearfishing and freediving environments. Inside, it is filled with \u003cstrong\u003enickel-plated lead shot\u003c\/strong\u003e, whose nickel-plated finish effectively prevents oxidation, ensuring long-lasting durability and reliability even in marine environments.\u003c\/p\u003e\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOuter material: \u003cstrong\u003eCordura\u003c\/strong\u003e, resistant to wear and the corrosive effects of saltwater\u003c\/li\u003e\n  \u003cli\u003eFilling: nickel-plated lead shot to prevent corrosion and maintain consistent weight\u003c\/li\u003e\n  \u003cli\u003eFunction: balancing weight for neck weight, optimized for the specific needs of freediving and spearfishing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAvailable Weight Options\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e250 grams\u003c\/li\u003e\n  \u003cli\u003e500 grams\u003c\/li\u003e\n  \u003cli\u003e1 kilogram\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese weighted pouches are designed to provide customized balance during freediving dives, making buoyancy control easier and improving underwater stability through modular weight distribution.\u003c\/p\u003e","brand":"Best Divers","offers":[{"title":"250 gr","offer_id":56925453025625,"sku":"APN662\/B","price":9.0,"currency_code":"EUR","in_stock":true},{"title":"500 gr","offer_id":56925453058393,"sku":"APN662\/D","price":14.0,"currency_code":"EUR","in_stock":true},{"title":"1.0 kg","offer_id":56925453091161,"sku":"APN662","price":24.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/Sacchetto_di_Zavorra_in_Cordura.png?v=1782075867"},{"product_id":"segmenti-collare-red-lobster","title":"Lobster Collar Segments - Red","description":"\u003ch2\u003eLobster Neck Weight Segments Designed for Freediving\u003c\/h2\u003e\n\u003cp\u003eThe segments for the \u003cstrong\u003eLobster neck weight\u003c\/strong\u003e are designed for freediving, with an innovative fastening system that allows the freediver to combine and assemble the segments according to their own weight and shape requirements.\u003c\/p\u003e\n\u003cp\u003eThe fastening mechanism uses rubber inserts that make the segments \u003cstrong\u003esemi-mobile\u003c\/strong\u003e, allowing them to adapt to vertebral movement without limiting spinal mobility during freediving dives.\u003c\/p\u003e\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAvailable in 5 different weights: 100 g, 200 g, 300 g, 400 g and 500 g, allowing modular, customized assembly.\u003c\/li\u003e\n  \u003cli\u003eVariable size and weight to optimize trim in the water.\u003c\/li\u003e\n  \u003cli\u003eRubber inserts to ensure flexibility and adaptability to the natural curve of the back.\u003c\/li\u003e\n  \u003cli\u003eColor: visible and identifiable red.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis modular system allows precise adjustment of the load on the neck weight, improving efficiency and comfort during breathing and underwater movement typical of spearfishing and freediving.\u003c\/p\u003e","brand":"Lobster","offers":[{"title":"100 gr","offer_id":56926664917337,"sku":"LB00006.100","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"200 gr","offer_id":56926664950105,"sku":"LB00006.200","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"300 gr","offer_id":56926664982873,"sku":"LB00006.300","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"400 g","offer_id":56926665015641,"sku":"LB00006.400","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"500 gr","offer_id":56926665048409,"sku":"LB00006.500","price":25.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/RED.png?v=1766636321"},{"product_id":"segmenti-collare-black-lobster","title":"Lobster Collar Segments - Black","description":"\u003ch2\u003eLobster Collar Segments Specifically for Freediving\u003c\/h2\u003e\n\u003cp\u003eThe segments for the \u003cstrong\u003eLobster collar\u003c\/strong\u003e are designed to meet the needs of spearfishing and freediving, ensuring proper balance during dives.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAvailable in \u003cstrong\u003e5 different weights\u003c\/strong\u003e: 100 g, 200 g, 300 g, 400 g, and 500 g, for precise ballast customization\u003c\/li\u003e\n  \u003cli\u003eBlack color for a discreet profile underwater\u003c\/li\u003e\n  \u003cli\u003eModular assembly system with rubber inserts\u003c\/li\u003e\n  \u003cli\u003eSemi-mobile movement between segments that follows the articulation of the vertebrae\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBenefits for the Freediver\u003c\/h3\u003e\n\u003cp\u003eThe fastening system allows the segments to be combined according to the required weight, enabling gradual and optimal adjustment for in-water trim.\u003c\/p\u003e\n\u003cp\u003eThe semi-mobility of the individual segments, ensured by the rubber inserts, promotes the natural flexibility of the spine without limiting freedom of movement during a dive. This feature helps maintain an ergonomic and comfortable trim during spearfishing or freediving.\u003c\/p\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAdaptable to different ballast requirements for freediving and spearfishing\u003c\/li\u003e\n  \u003cli\u003eIdeal for freedivers who need customized, dynamic balance\u003c\/li\u003e\n  \u003cli\u003eCompatible with the Lobster collar, used to improve stability and trim while diving\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lobster","offers":[{"title":"100 gr","offer_id":56926665212249,"sku":"LB00007.100","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"200 gr","offer_id":56926665245017,"sku":"LB00007.200","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"300 g","offer_id":56926665277785,"sku":"LB00007.300","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"400 gr","offer_id":56926665310553,"sku":"LB00007.400","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"500 gr","offer_id":56926665343321,"sku":"LB00007.500","price":25.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/black.png?v=1766636342"},{"product_id":"segmenti-collare-yellow-lobster","title":"Lobster Collar Segments - Yellow","description":"\u003ch2\u003eLobster Collar Segments Specifically for Freediving\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eLobster collar segments\u003c\/strong\u003e are designed for freediving and allow a modular, customized weight configuration. Thanks to their innovative fastening system, the freediver can assemble the segments flexibly, adapting the collar to their spearfishing or freediving needs.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features and Functionality\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAvailable in \u003cstrong\u003e5 different weights\u003c\/strong\u003e: 100, 200, 300, 400, and 500 grams, for precise load management.\u003c\/li\u003e\n  \u003cli\u003eAssembly system with rubber inserts that allows a semi-mobile connection between the segments.\u003c\/li\u003e\n  \u003cli\u003eDesign that follows the natural movement of the vertebrae, without limiting spinal flexibility during dives.\u003c\/li\u003e\n  \u003cli\u003eMaterials engineered to ensure \u003cstrong\u003emechanical strength\u003c\/strong\u003e and \u003cstrong\u003edurability\u003c\/strong\u003e in the underwater environment.\u003c\/li\u003e\n  \u003cli\u003eYellow color, to improve visibility and identification in the marine environment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBenefits for Freediving and Spearfishing\u003c\/h3\u003e\n\u003cp\u003eThe modular segment system allows optimal, dynamic weight distribution, essential for:\u003c\/p\u003e\n\u003col\u003e\n  \u003cli\u003eMaintaining balanced trim during spearfishing.\u003c\/li\u003e\n  \u003cli\u003eEnsuring maximum freedom of movement for the spine.\u003c\/li\u003e\n  \u003cli\u003eAdapting to different ballast requirements based on dive conditions and individual experience.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eUse Specifications\u003c\/h3\u003e\n\u003cp\u003eTo customize the collar:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSelect the required segments according to the desired weight.\u003c\/li\u003e\n  \u003cli\u003eAssemble the segments using the rubber inserts, avoiding excessive rigidity.\u003c\/li\u003e\n  \u003cli\u003eCheck that the collar ergonomically fits the shape of the spine to optimize comfort and freedom of movement.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lobster","offers":[{"title":"100 gr","offer_id":56926665408857,"sku":"LB00008.100","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"200 gr","offer_id":56926665441625,"sku":"LB00008.200","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"300 gr","offer_id":56926665474393,"sku":"LB00008.300","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"400 gr","offer_id":56926665507161,"sku":"LB00008.400","price":25.5,"currency_code":"EUR","in_stock":true},{"title":"500 gr","offer_id":56926665539929,"sku":"LB00008.500","price":25.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/Yellow.png?v=1766636363"},{"product_id":"segmenti-collare-dark-blue-lobster","title":"Lobster Collar Segments - Dark Blue","description":"\u003ch2\u003eLobster Neck Weight Segments Specifically for Freediving\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eLobster neck weight segments\u003c\/strong\u003e are designed specifically for freediving, offering a modular system that adapts to the needs of spearfishers or freedivers. Their structure allows the weight to be adjusted as needed by combining individual segments.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features and Functionality\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAvailable in \u003cstrong\u003e5 different weights\u003c\/strong\u003e: 100, 200, 300, 400, and 500 grams for precise balancing\u003c\/li\u003e\n  \u003cli\u003eInnovative fastening system with rubber inserts for quick installation and removal of the segments\u003c\/li\u003e\n  \u003cli\u003eSemi-mobile segments that follow the joint movements of the cervical vertebrae to ensure \u003cstrong\u003efreedom of movement\u003c\/strong\u003e of the spine during freediving\u003c\/li\u003e\n  \u003cli\u003eAdaptability to the curves of the back thanks to the flexibility of the connection mechanism\u003c\/li\u003e\n  \u003cli\u003eColor: \u003cstrong\u003eDark Blue\u003c\/strong\u003e for a discreet, functional look underwater\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBenefits for Freediving and Spearfishing\u003c\/h3\u003e\n\u003cp\u003eThanks to the ability to customize the additional load, the segments allow precise weight balancing, improving underwater trim without compromising freedom of movement in the neck and back. 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The modular weight distribution makes it possible to quickly adjust trim without compromising freedom of movement and without overloading the neck—essential factors during extended freediving sessions or deep-water dives.\u003c\/p\u003e\n\u003cp\u003eThe combination of comfort, hydrodynamics, and practicality makes this system ideal for freedivers who require precise balance and an ergonomic weight that can follow the body’s natural movements during spearfishing or freediving.\u003c\/p\u003e","brand":"Lobster","offers":[{"title":"1.3 kg","offer_id":58374468174169,"sku":"LB00023 - RED MATE","price":159.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/lobster-squid-weight-red.png?v=1766640842"},{"product_id":"collare-apnea-squid-full-set-black-mate-12kg-lobster","title":"Squid Neck Weight 1,3 Kg - Black Matt","description":"\u003ch2\u003eLobster Squid Weight 1.3 kg Freediving Weight Collar\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSquid Weight\u003c\/strong\u003e is a modular weight collar designed specifically for spearfishing and deep-water freediving. 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This modular system makes it easy to add or remove weights to customize the load according to dive depth and duration.\u003c\/p\u003e\n\u003ch3\u003eMain Technical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e800 g base collar with 10 weight segments of 50 g each\u003c\/li\u003e\n  \u003cli\u003eTotal weight adjustable up to 1.3 kg\u003c\/li\u003e\n  \u003cli\u003eHydrodynamic design to minimize drag in the water\u003c\/li\u003e\n  \u003cli\u003eSemi-mobile segments that follow the movements of the dorsal spine\u003c\/li\u003e\n  \u003cli\u003eEasy assembly and disassembly for weight customization\u003c\/li\u003e\n  \u003cli\u003eSecure fastening with silicone strap\u003c\/li\u003e\n  \u003cli\u003eMatte black color, resistant to marine elements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e800 g Lobster Squid Weight collar\u003c\/li\u003e\n  \u003cli\u003e10 additional 50 g segments\u003c\/li\u003e\n  \u003cli\u003eSilicone safety strap\u003c\/li\u003e\n  \u003cli\u003eCarry Bag\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Squid Weight collar is a versatile, technical tool for freediving and spearfishing, offering the perfect balance between comfort, freedom of movement, and precise weight adjustment in deep underwater environments.\u003c\/p\u003e","brand":"Lobster","offers":[{"title":"1.3 kg","offer_id":58374466208089,"sku":"LB00023 - BLACK MATE","price":159.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/lobstre-squid-weight-black.png?v=1766640863"},{"product_id":"collare-c4-dyno-nero-4kg","title":"Dyno 4kg Neck Weight - Black","description":"\u003ch2\u003eDyno Neck Weight 4.0 kg for Freediving – Modular Weight System\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eDyno Neck Weight\u003c\/strong\u003e in \u003cstrong\u003e4.0 kg\u003c\/strong\u003e, designed by C4, is a weight system specifically developed for spearfishing and freediving. Its \u003cstrong\u003ehydrodynamic shape\u003c\/strong\u003e reduces bulk and does not overload the neck during finning, improving efficiency and fluidity of underwater movement.\u003c\/p\u003e\n\n\u003ch3\u003eDesign and Comfort\u003c\/h3\u003e\n\u003cp\u003eThe neck weight is made up of semi-mobile segments that adapt to the movement of the thoracic vertebrae, ensuring full joint freedom with no restriction of movement. This feature increases comfort during the dive while keeping the weight concentrated close to the balance point of buoyancy forces, optimizing trim in the water.\u003c\/p\u003e\n\n\u003ch3\u003eModularity and Weight Customization\u003c\/h3\u003e\n\u003cp\u003eThe segments, with varying weights, are easy to assemble and disassemble thanks to axles with locking screws. 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The structure allows optimal gear customization, improving comfort and practicality in everyday use.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56926865817945,"sku":"0ACC4005","price":25.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/C4_24.25_Collare-Dyno-Black-esploso.png?v=1766642091"},{"product_id":"segmento-c4-dyno-nero-1-kg","title":"Dyno Segment 1 Kg - Black","description":"\u003ch2\u003e1 Kg Segment for C4 Dyno Neck Weight – Freediving Gear\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e1 Kg segment\u003c\/strong\u003e is specifically designed for use with the \u003cstrong\u003eC4 Dyno neck weight\u003c\/strong\u003e, an essential component in \u003cstrong\u003efreediving\u003c\/strong\u003e and \u003cstrong\u003espearfishing\u003c\/strong\u003e gear. 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This feature improves comfort during the dive, maintaining balanced, stable trim in the water.\u003c\/p\u003e\n\u003cp\u003eThe system’s \u003cstrong\u003emodularity\u003c\/strong\u003e allows the freediver to precisely customize weight distribution based on diving style and specific conditions, optimizing efficiency and underwater maneuverability.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56926902550873,"sku":"0ACC4008","price":40.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/dyno-segmento-1kg-1.png?v=1766643222"},{"product_id":"collare-apnea-lobster-da-4-kg-colore-very-pery","title":"Lobster Collar 4 Kg - Very Pery","description":"\u003ch2\u003eLobster 4.0 kg Neck Weight for Freediving\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eLobster Neck Weight\u003c\/strong\u003e weighing \u003cstrong\u003e4.0 kg\u003c\/strong\u003e is a modular weight system specifically designed for spearfishing and freediving. 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Its highly \u003cstrong\u003ehydrodynamic\u003c\/strong\u003e structure optimizes the \u003cstrong\u003eswim stroke\u003c\/strong\u003e and allows you to reach greater depths with improved efficiency and safety.\u003c\/p\u003e\n\u003cp\u003eThe shape can be customized to fit different neck circumferences, ensuring a precise and stable fit during underwater activity. This distributes weight evenly, improving body position and reducing neck fatigue.\u003c\/p\u003e\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMade with lightweight, durable materials optimized for underwater use.\u003c\/li\u003e\n  \u003cli\u003eErgonomic, hydrodynamic design to improve fluidity of movement in the water.\u003c\/li\u003e\n  \u003cli\u003eFastening via a silicone strap that fits into the dedicated holes, ensuring stability and comfort.\u003c\/li\u003e\n  \u003cli\u003eInterlocking modular segments for adding extra weights and customizing ballast according to dive requirements.\u003c\/li\u003e\n  \u003cli\u003eSuitable for any neck diameter, ensuring an adjustable and secure fit.\u003c\/li\u003e\n  \u003cli\u003eColor: Red.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits for Freedivers and Spearfishermen\u003c\/h3\u003e\n\u003cp\u003eThe balanced weight distribution helps maintain a correct, stable posture during swimming, reducing neck fatigue and improving \u003cstrong\u003epropulsion efficiency\u003c\/strong\u003e. The ability to bring the hands together above the head supports a hydrodynamic position that makes forward movement and control easier during descent and ascent.\u003c\/p\u003e","brand":"Lobster","offers":[{"title":"800 gr","offer_id":58374473285977,"sku":"LB00026 - base BLACK MATE","price":109.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/base-squid-bk.png?v=1766645378"},{"product_id":"inserto-collare-squid-50gr-red-matt-lobster","title":"Squid Collar Insert 50gr - Red Matt","description":"\u003ch2\u003eSquid Lobster Neck Weight Insert - Freediving Accessory\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSquid Lobster neck weight insert\u003c\/strong\u003e is designed specifically for freediving and spearfishing, allowing precise adjustment of the neck weight based on individual needs.\u003c\/p\u003e\n\u003cp\u003eThe snap-in fastening system ensures optimal practicality, allowing the freediver to easily add or remove inserts, quickly and safely fine-tuning ballast during dives.\u003c\/p\u003e\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSingle insert weight: \u003cstrong\u003e50 grams\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eColor: \u003cstrong\u003eRed Mat\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eFastening method: \u003cstrong\u003esnap-in\u003c\/strong\u003e system for quick weight adjustment\u003c\/li\u003e\n  \u003cli\u003eVariable dimensions and weight to fit the Squid Lobster neck weight precisely\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThanks to these features, the insert ensures optimal weight distribution, contributing to better trim and greater efficiency of movement in the water.\u003c\/p\u003e","brand":"Lobster","offers":[{"title":"50 g","offer_id":58374471352665,"sku":"LB00027 - insert RED MATE","price":15.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/inserto-squid-Red.png?v=1766645397"},{"product_id":"inserto-collare-squid-50gr-black-matt-lobster","title":"Squid Neck Weight Insert 50gr - Black Matt","description":"\u003ch2\u003eSquid Lobster Collar Insert for Freediving\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003einsert\u003c\/strong\u003e is specifically designed for the \u003cstrong\u003eSquid Lobster collar\u003c\/strong\u003e, an accessory created for freediving and spearfishing. The modular solution allows the freediver to customize the collar’s overall weight, adapting it to their buoyancy requirements.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eInsert weight: 50 grams\u003c\/li\u003e\n  \u003cli\u003eColor: Black Mat\u003c\/li\u003e\n  \u003cli\u003eSnap-in fastening system for quick, practical installation or removal of the inserts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eOperational Benefits\u003c\/h3\u003e\n\u003cp\u003eThe snap-in mechanism ensures a stable hold, allowing inserts to be easily added or removed to precisely adjust the collar load. This modularity enables optimal balance during freediving dives, improving comfort and buoyancy control.\u003c\/p\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eThe inserts are designed for freedivers and spearfishers who require flexible weight management on the Squid Lobster collar, optimizing fit and comfort during dives.\u003c\/p\u003e","brand":"Lobster","offers":[{"title":"50 g","offer_id":58374470893913,"sku":"LB00028 - insert BLACK MATE","price":15.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/inserto-squid-black.png?v=1766645415"},{"product_id":"base-collare-apnea-lobster-red","title":"Lobster Neck Weight Base - Red","description":"\u003ch2\u003eLobster Neck Weight Base - Red\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eLobster neck weight base\u003c\/strong\u003e was designed to distribute weight optimally during \u003cstrong\u003edynamic apnea\u003c\/strong\u003e sessions, preventing excess load on the freediver’s neck during the dive. Its highly \u003cstrong\u003ehydrodynamic\u003c\/strong\u003e structure improves swimming efficiency, allowing you to cover greater distances with less fatigue.\u003c\/p\u003e\n\u003ch3\u003eDesign and functionality\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eErgonomic shape that distributes weight toward the balance point of buoyancy forces\u003c\/li\u003e\n\u003cli\u003eAllows you to bring your hands together above your head for a smoother, more efficient swim\u003c\/li\u003e\n\u003cli\u003eModular segments in different weights and sizes to adjust the load according to your needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eComponents and materials\u003c\/h3\u003e\n\u003cp\u003eAdditional weights (not included with the base) are secured with silicone inserts, ensuring a safe yet flexible connection. This system allows the segments to follow the movement of the vertebrae without restricting mobility, ensuring comfort and freedom of movement.\u003c\/p\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBase weight: three different sizes (1.5 kg - 2.5 kg - 4.0 kg)\u003c\/li\u003e\n\u003cli\u003eColor: Red\u003c\/li\u003e\n\u003cli\u003eAdditional weight modules (segments) available separately\u003c\/li\u003e\n\u003cli\u003eHydrodynamic design to reduce drag in the water while swimming\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits for freediving use\u003c\/h3\u003e\n\u003cp\u003eLobster improves balance and helps maintain proper posture, increasing finning efficiency and reducing neck fatigue. The freedom of movement provided by the segment system allows you to maintain fluid motion and comfort.\u003c\/p\u003e","brand":"Lobster","offers":[{"title":"1.5 kg","offer_id":57267860635993,"sku":null,"price":149.0,"currency_code":"EUR","in_stock":true},{"title":"2.5 kg","offer_id":57267860668761,"sku":null,"price":159.0,"currency_code":"EUR","in_stock":true},{"title":"4.0 kg","offer_id":57267860701529,"sku":null,"price":189.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/lobster-base-collare-4kg-red.png?v=1766645457"},{"product_id":"collare-d-d-c4-deep-dynamic-nero-4kg","title":"D\u0026d Neck Weight 4kg - Black","description":"\u003ch2\u003eD\u0026amp;D Modular Weight Neck Collar - Deep \u0026amp; Dynamic for freediving and spearfishing\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eD\u0026amp;D Neck Collar\u003c\/strong\u003e by C4 represents an important evolution of the traditional Dyno neck collar, designed specifically for those practicing \u003cstrong\u003edeep freediving\u003c\/strong\u003e and \u003cstrong\u003edynamic apnea\u003c\/strong\u003e. Its main feature is its adjustable weight, which can range from \u003cstrong\u003e1 kg\u003c\/strong\u003e up to \u003cstrong\u003e4 kg\u003c\/strong\u003e depending on the needs of the dive, providing a single product adaptable to different buoyancy setups.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical features and materials\u003c\/h3\u003e\n\u003cp\u003eMade from \u003cstrong\u003elead coated with thermoplastic rubber\u003c\/strong\u003e, the neck collar features a hydrodynamic shape designed to optimize \u003cstrong\u003efinning fluidity\u003c\/strong\u003e and reduce load on the neck, improving comfort and freedom of movement during freediving.\u003c\/p\u003e\n\u003cp\u003eThe weight is positioned close to the body’s center of gravity, aligning with buoyancy forces to make balancing in the water easier. In addition, the semi-mobile rear segments are designed to follow the natural movement of the thoracic vertebrae without limiting the swimmer’s mobility.\u003c\/p\u003e\n\n\u003ch3\u003eModularity and configurations\u003c\/h3\u003e\n\u003cp\u003eThe system consists of a modular base neck collar to which removable, numbered rear segments made of plastic attach, allowing the weight to be adjusted quickly and safely, also thanks to safety clips that prevent accidental loss.\u003c\/p\u003e\n\u003cp\u003eThe available configurations are:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1.6 kg Neck Collar\u003c\/strong\u003e - ideal for deep dives, with reduced weight for greater agility\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3 kg Neck Collar\u003c\/strong\u003e - version with 4 rear segments for a balanced and versatile buoyancy setup\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4 kg Neck Collar\u003c\/strong\u003e - with 5 rear segments for dynamic apnea and increased ballast\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBenefits during underwater use\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise weight adjustment\u003c\/strong\u003e to easily adapt to the type of freedive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReduced cervical stress\u003c\/strong\u003e thanks to the ergonomic shape and soft coating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum freedom of movement\u003c\/strong\u003e ensured by the semi-mobile segments that move with the spine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimple and secure assembly\u003c\/strong\u003e with numbered segments and anti-loss clips\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe D\u0026amp;D Neck Collar is a targeted technical solution for freedivers and spearfishers who need a customizable weight system that improves \u003cstrong\u003eefficiency\u003c\/strong\u003e, \u003cstrong\u003ecomfort\u003c\/strong\u003e, and \u003cstrong\u003ebuoyancy control\u003c\/strong\u003e in the water.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56926997872985,"sku":"0ACC4017","price":209.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/C4_25_DD-4kg-NERO-Piombo.png?v=1766645480"},{"product_id":"collare-d-d-c4-deep-dynamic-nero-3-kg","title":"D\u0026d Neck Weight 3kg - Black","description":"\u003ch2\u003eD\u0026amp;D - Deep \u0026amp; Dynamic Neck Weight for Freediving and Spearfishing\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe D\u0026amp;D neck weight\u003c\/strong\u003e represents the evolution of the Dyno neck weight from \u003cstrong\u003eC4\u003c\/strong\u003e, specifically designed for deep freediving and dynamic apnea. The name Deep \u0026amp; Dynamic highlights its versatility: it allows the weight to be adjusted from 1 kg up to 4 kg in a single modular system optimized for spearfishing and deep freediving.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdjustable weight from 1 kg to 4 kg with removable, adjustable segments\u003c\/li\u003e\n\u003cli\u003eMaterial: lead coated in durable, hydrodynamic thermoplastic rubber\u003c\/li\u003e\n\u003cli\u003eShape designed to minimize load on the neck and improve finning\u003c\/li\u003e\n\u003cli\u003eSemi-mobile rear segments follow the movement of the thoracic vertebrae, ensuring full joint freedom\u003c\/li\u003e\n\u003cli\u003eEquipped with a safety clip to prevent accidental loss during dives\u003c\/li\u003e\n\u003cli\u003eColor: black\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFunctionality and Benefits\u003c\/h3\u003e\n\u003cp\u003eThe weight distribution is optimized to work close to the body’s center of gravity, balancing buoyancy forces and improving freediving efficiency. Thanks to the semi-mobile segments, the neck weight does not restrict the swimmer’s movements, maintaining fluidity and comfort during descent and ascent.\u003c\/p\u003e\n\n\u003ch3\u003eAvailable Configurations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.6 kg:\u003c\/strong\u003e base configuration ideal for deep dives that require a light, balanced trim\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 kg:\u003c\/strong\u003e neck weight with four rear segments for medium buoyancy compensation in dynamic apnea\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 kg:\u003c\/strong\u003e neck weight with five rear segments for more demanding dynamic apnea sessions, with a higher ballast load\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIncluded Equipment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNumbered plastic segments to make assembly and weight adjustment easier\u003c\/li\u003e\n\u003cli\u003eSafety clip for fastening and prevention of accidental loss\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe D\u0026amp;D neck weight provides a modular, functional system for quickly adjusting ballast balance in freediving, combining \u003cstrong\u003ehydrodynamics\u003c\/strong\u003e, \u003cstrong\u003ecomfort\u003c\/strong\u003e, and \u003cstrong\u003efreedom of movement\u003c\/strong\u003e, key aspects for spearfishing and freediving.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56926997971289,"sku":"0ACC4010","price":189.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/C4_25_DD-3kg-NERO-piombo.png?v=1766645502"},{"product_id":"collare-d-d-c4-deep-dynamic-nero-1-6kg","title":"D\u0026d Neck Weight 1.6 Kg - Black","description":"\u003ch2\u003eD\u0026amp;D Collar - Deep \u0026amp; Dynamic for Freediving and Spearfishing\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eD\u0026amp;D Collar, Deep \u0026amp; Dynamic\u003c\/strong\u003e, represents the evolution of the Dyno collar made by the \u003cstrong\u003eC4\u003c\/strong\u003e brand, designed specifically for freedivers practicing both depth and dynamic disciplines. Its key feature is weight modulation, allowing the ballast to be adjusted from 1 kg up to 4 kg in a single product, ensuring flexibility and precision when fine-tuning underwater trim.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMade of lead coated with thermoplastic rubber, ensuring mechanical strength and protection against wear\u003c\/li\u003e\n  \u003cli\u003eHighly \u003cstrong\u003ehydrodynamic\u003c\/strong\u003e design to reduce drag in the water and promote a \u003cstrong\u003esmooth swimming motion\u003c\/strong\u003e without overloading the neck\u003c\/li\u003e\n  \u003cli\u003eSemi-mobile segments that follow the movements of the thoracic vertebrae, ensuring \u003cstrong\u003emaximum freedom of movement\u003c\/strong\u003e without restrictions\u003c\/li\u003e\n  \u003cli\u003eWeight distribution concentrated near the balance point of buoyancy forces, improving \u003cstrong\u003estability and balance\u003c\/strong\u003e during the dive\u003c\/li\u003e\n  \u003cli\u003eEquipped with safety clips to prevent accidental loss of the segments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFunctionality and Modularity\u003c\/h3\u003e\n\u003cp\u003eThe system consists of a modular collar to which up to 5 semi-mobile rear segments with variable weights can be added, making it easy to move from a 1 kg setup up to 4 kg. The numbered plastic segments allow quick assembly and replacement, making it easier to adapt to different diving conditions.\u003c\/p\u003e\n\n\u003ch3\u003eAvailable Configurations\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1.6 kg collar, suitable for depth freediving\u003c\/li\u003e\n  \u003cli\u003e3 kg collar with 4 rear segments\u003c\/li\u003e\n  \u003cli\u003e4 kg collar with 5 rear segments, ideal for dynamic freediving when more ballast is required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAdditional Details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eColor: black\u003c\/li\u003e\n  \u003cli\u003eBase weight: 1.6 kg\u003c\/li\u003e\n  \u003cli\u003eRear segments can be added or replaced by purchasing the 4-piece kit or individual \u003ca href=\"https:\/\/deepbluesub.com\/prodotto\/c4-segmento-dyno-nero-280gr\/\"\u003e280 gram Dyno\u003c\/a\u003e and \u003ca href=\"https:\/\/deepbluesub.com\/prodotto\/segmento-dyno-nero-1-kg\/\"\u003e1 kg Dyno\u003c\/a\u003e segments\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eD\u0026amp;D\u003c\/strong\u003e collar is an ideal technical solution for freedivers and spearfishers who need a modular, comfortable ballast system to optimize trim in both static and dynamic dives, improving weight transfer and freedom of movement during finning.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56926998036825,"sku":"0ACC4015","price":129.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/C4_25_DD-1-kg-Nero-6.png?v=1766645526"},{"product_id":"kit-segmenti-collare-d-d-c4-deep-dynamic-nero","title":"Segment Kit for C4 Neck Weights - Black","description":"\u003ch2\u003eWeight Segment Kit for C4 Dyno and D\u0026amp;D Neck Weights\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003e1.4 kg segment kit\u003c\/strong\u003e is designed to allow weight customization for \u003cstrong\u003eC4 neck weights\u003c\/strong\u003e used in freediving and spearfishing, ensuring precise, adjustable buoyancy trim according to different underwater needs.\u003c\/p\u003e\n\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e4 separate weight segments: 500 g, 380 g, 280 g, and 210 g\u003c\/li\u003e\n  \u003cli\u003eCompatible with \u003cstrong\u003eDyno\u003c\/strong\u003e and \u003cstrong\u003eD\u0026amp;D\u003c\/strong\u003e C4 models\u003c\/li\u003e\n  \u003cli\u003eComplete with \u003cstrong\u003estainless steel\u003c\/strong\u003e rods and screws for secure, corrosion-resistant fastening\u003c\/li\u003e\n  \u003cli\u003eBlack color for a discreet profile that integrates cleanly with your gear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Features and Benefits\u003c\/h3\u003e\n\u003cp\u003eBy allowing the weight segments to be combined, the kit makes it possible to precisely adjust the load on the neck weight, optimizing underwater trim. The use of materials such as stainless steel ensures mechanical strength and durability even in marine environments.\u003c\/p\u003e\n\u003cp\u003eThe screw-and-rod assembly provides stable, reliable fastening, preventing unwanted movement during freediving or spearfishing sessions.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56926998069593,"sku":"0ACC4016","price":82.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/C4-Collare-kit-Black.png?v=1766645545"},{"product_id":"collare-c4-d-d-deep-dynamic-bianco-4kg","title":"D\u0026d Neck Weight 4kg - White","description":"\u003ch2\u003eD\u0026amp;D Neck Weight - Deep \u0026amp; Dynamic for Freediving and Spearfishing\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eD\u0026amp;D Neck Weight\u003c\/strong\u003e represents the evolution of the \u003cstrong\u003eC4\u003c\/strong\u003e Dyno neck weight, designed specifically for freediving in both depth and dynamic disciplines. The name \u003cstrong\u003eDeep \u0026amp; Dynamic\u003c\/strong\u003e reflects the product’s technical versatility, allowing the weight to be adjusted from 1 kg up to 4 kg in a single system adaptable to different diving needs.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMade from lead coated with a layer of thermoplastic rubber to ensure mechanical strength and long-lasting durability.\u003c\/li\u003e\n  \u003cli\u003eHighly \u003cstrong\u003ehydrodynamic\u003c\/strong\u003e shape designed to reduce drag and minimize load on the neck, improving the fluidity of the \u003cstrong\u003efin kick\u003c\/strong\u003e and freedom of movement while freediving.\u003c\/li\u003e\n  \u003cli\u003eSemi-mobile segments that follow the anatomy of the thoracic vertebrae, allowing a more natural, unrestricted trim while swimming.\u003c\/li\u003e\n  \u003cli\u003eModular system consisting of a main neck weight to which segments can be added or removed at the rear to vary weight and trim.\u003c\/li\u003e\n  \u003cli\u003eEquipped with numbered plastic segments to make assembly easier and allow precise load adjustment.\u003c\/li\u003e\n  \u003cli\u003eIntegrated safety clips to prevent accidental loss of the segments during the dive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWeight Configurations\u003c\/h3\u003e\n\u003cp\u003eThe D\u0026amp;D Neck Weight is available in three configurations designed for different types of diving:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1.6 kg\u003c\/strong\u003e - ideal for deep dives, providing efficient balance while reducing bulk.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3 kg\u003c\/strong\u003e - neck weight equipped with 4 rear segments for an intermediate trim adaptable to more agile dynamics.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4 kg\u003c\/strong\u003e - full configuration with 5 rear segments for dynamic dives that require greater ballast load.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBenefits for Freedivers and Spearfishers\u003c\/h3\u003e\n\u003cp\u003eThanks to its adjustable weight and distinctive ergonomic shape, the D\u0026amp;D Neck Weight significantly improves trim control during freediving and spearfishing. The weight load is optimized close to the center of buoyancy, ensuring better balance and greater movement efficiency.\u003c\/p\u003e\n\u003cp\u003eThe system’s adaptability with semi-mobile segments and the lightweight coating material contribute to excellent comfort during extended use and complete joint freedom.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56926998135129,"sku":"0ACC4017W","price":209.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/C4_25_DD-4kg-Bianco_8de933c4-41e0-4481-964a-76676a56a805.png?v=1766645566"},{"product_id":"collare-c4-d-d-deep-dynamic-bianco-3kg","title":"D\u0026d Neck Weight 3kg - White","description":"\u003ch2\u003eD\u0026amp;D - Deep \u0026amp; Dynamic Weight Neck Weight for Freediving and Spearfishing\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eD\u0026amp;D Neck Weight\u003c\/strong\u003e represents the technical evolution of the well-known Dyno neck weight produced by \u003cstrong\u003eC4\u003c\/strong\u003e, designed specifically for deep and dynamic freediving. Its design allows the weight to be adjusted from 1 kg to 4 kg by adding or removing segments, providing the versatility needed for different types of dives.\u003c\/p\u003e\n\u003cp\u003eMade of Lead Weight coated with a layer of thermoplastic rubber, the neck weight features a highly \u003cstrong\u003ehydrodynamic\u003c\/strong\u003e shape that reduces load on the neck, allowing for a smoother, less tiring \u003cstrong\u003efin kick\u003c\/strong\u003e. Positioning the weight close to the hydrostatic balance point optimizes in-water trim, improving vertical stability and reducing \u003cstrong\u003emechanical resistance\u003c\/strong\u003e during movement.\u003c\/p\u003e\n\u003cp\u003eThe system consists of a modular neck weight with semi-mobile rear segments that follow the anatomy and movements of the thoracic spine, ensuring complete \u003cstrong\u003efreedom of movement\u003c\/strong\u003e and minimizing any joint restriction during freediving sessions.\u003c\/p\u003e\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial: Lead Weight coated in thermoplastic rubber\u003c\/li\u003e\n\u003cli\u003eHydrodynamic design for greater fluidity in the water\u003c\/li\u003e\n\u003cli\u003eModular system with numbered plastic segments for fine-tuning the weight\u003c\/li\u003e\n\u003cli\u003eSemi-mobile rear segments to adapt to the movements of the thoracic vertebrae\u003c\/li\u003e\n\u003cli\u003eSafety clip to prevent accidental loss of the neck weight\u003c\/li\u003e\n\u003cli\u003eAdjustable weight from 1 kg (minimum configuration) up to 4 kg (maximum configuration)\u003c\/li\u003e\n\u003cli\u003eBase product dimensions and weight: 3.0 kg, white color\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAvailable Configurations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1.6 kg neck weight – ideal for deep dives\u003c\/li\u003e\n\u003cli\u003e3 kg neck weight – structure with 4 rear segments\u003c\/li\u003e\n\u003cli\u003e4 kg neck weight – structure with 5 rear segments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe \u003cstrong\u003eD\u0026amp;D - Deep \u0026amp; Dynamic Neck Weight\u003c\/strong\u003e is designed to meet the specific needs of spearfishing and freediving in both static and dynamic setups, optimizing the diver’s body balance and ensuring comfort and practicality even during extended dives.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56926998462809,"sku":"0ACC4010W","price":189.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/C4_25_DD-3kg-Bianco2.png?v=1766645586"},{"product_id":"collare-c4-d-d-deep-dynamic-bianco-1-6kg","title":"D\u0026d Neck Weight 1.6kg - White","description":"\u003ch2\u003eD\u0026amp;D - Deep \u0026amp; Dynamic Neck Weight for Freediving and Spearfishing\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe D\u0026amp;D neck weight\u003c\/strong\u003e is a modular ballast system developed by the \u003cstrong\u003eC4\u003c\/strong\u003e brand, designed specifically for the needs of freediving and spearfishing, both for deep dives and dynamic apnea. The name Deep \u0026amp; Dynamic reflects the product’s versatility, allowing the weight to be adjusted from 1 kg up to 4 kg to suit different types of dives.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features and Materials\u003c\/h3\u003e\n\u003cp\u003eThe structure is made of lead coated with thermoplastic rubber, a combination that ensures high \u003cstrong\u003emechanical strength\u003c\/strong\u003e and durability while maintaining excellent \u003cstrong\u003ehydrodynamics\u003c\/strong\u003e. The shape of the neck weight is designed to prevent overload on the neck, improving \u003cstrong\u003estreamlining\u003c\/strong\u003e and comfort during finning.\u003c\/p\u003e\n\u003cp\u003eThe ballast segments are semi-mobile and positioned close to the balance center of buoyancy forces, allowing a more natural, less fatiguing trim for the swimmer. Their ability to follow the movement of the thoracic vertebrae ensures complete joint freedom and no restriction of movement in the water.\u003c\/p\u003e\n\n\u003ch3\u003eWeight Modularity and Customization\u003c\/h3\u003e\n\u003cp\u003eThe system consists of a modular neck weight supplied with additional rear segments of variable weight, easily removable and mountable to adjust the total ballast. This modularity allows the neck weight to be quickly adapted to different dive requirements without compromising comfort or fit.\u003c\/p\u003e\n\u003cp\u003eIt is supplied with numbered plastic segments to make it easier to replace the front weights with lightweight segments, creating different weight configurations. 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The total kit weight is \u003cstrong\u003e1.4 kg\u003c\/strong\u003e, allowing buoyancy to be easily adjusted according to the needs of spearfishing and freediving.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e500 g, 380 g, 280 g, and 210 g segments, for a total of 1.4 kg\u003c\/li\u003e\n  \u003cli\u003eFastening materials: pins and screws in \u003cstrong\u003estainless steel\u003c\/strong\u003e, ensuring corrosion resistance in marine environments\u003c\/li\u003e\n  \u003cli\u003eCompatibility: suitable for \u003cstrong\u003eDyno\u003c\/strong\u003e and \u003cstrong\u003eD\u0026amp;D C4\u003c\/strong\u003e neck weights\u003c\/li\u003e\n  \u003cli\u003eColor: White, for a discreet integration with freediving and spearfishing gear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFunctions and Benefits\u003c\/h3\u003e\n\u003cp\u003eThis kit allows precise weight adjustment on the neck weight, essential for achieving optimal trim during freediving descents. The ability to combine the individual segments provides accurate control over weight distribution, improving comfort and efficiency in underwater movement.\u003c\/p\u003e\n\n\u003cp\u003eThe stainless steel components ensure secure, long-lasting attachment even with frequent use in saltwater, while the modular design makes the segments easy to install and remove.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56926998856025,"sku":"0ACC4016W","price":82.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/C4Collare-kit-white.png?v=1766645632"},{"product_id":"segmento-c4-dyno-bianco-1-kg","title":"Dyno Segment 1 Kg - White","description":"\u003ch2\u003e1 KG Segment for C4 Dyno Freediving Neck Weight\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e1 kg segment\u003c\/strong\u003e is designed specifically for the \u003cstrong\u003eC4 Dyno neck weight\u003c\/strong\u003e, an essential component for freedivers who need customization and comfort when balancing weight during freediving activities.\u003c\/p\u003e\n\u003cp\u003eThe screw fastening system allows multiple segments to be assembled and combined, adapting the overall weight to the individual needs of the freediver. This modularity enables precise, functional adjustment, ensuring optimal balance during the dive.\u003c\/p\u003e\n\u003cp\u003eA distinctive feature of this segment is its semi-mobile behavior once secured. This flexibility allows the segments to move in sync with the spine, preventing restriction and preserving natural freedom of movement during finning and gun tracking.\u003c\/p\u003e\n\u003ch3\u003eMain Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterial: made to ensure mechanical strength and long-lasting durability\u003c\/li\u003e\n  \u003cli\u003eFastening system: screw and axle included for secure, stable assembly\u003c\/li\u003e\n  \u003cli\u003eColor: white, with a version also available in black\u003c\/li\u003e\n  \u003cli\u003eCompatibility: exclusively for the C4 Dyno neck weight designed for freediving\u003c\/li\u003e\n  \u003cli\u003eSemi-mobile design to follow the movements of the spine without restriction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis segment is an ideal technical solution for freediving and spearfishing, where the ability to fine-tune weight and maintain optimal ergonomics is essential for safety and efficiency during the dive.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56927027265881,"sku":"0ACC4008W","price":40.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/dyno-segmento-1kg-red.png?v=1767439882"},{"product_id":"segmento-c4-dyno-bianco-280gr","title":"Dyno Segment 280gr - White","description":"\u003ch2\u003e280-Gram Segment for Dyno C4 Neck Weight Specifically for Freediving\u003c\/h2\u003e\n\u003cp\u003eThe segment is designed for the Dyno C4 neck weight, a device developed exclusively for the needs of spearfishing and freediving.\u003c\/p\u003e\n\u003cp\u003eMade with a lightweight \u003cstrong\u003e280-gram\u003c\/strong\u003e structure, it ensures optimal load management without affecting underwater mobility.\u003c\/p\u003e\n\n\u003ch3\u003eAttachment System and Functionality\u003c\/h3\u003e\n\u003cp\u003eThe segment uses a \u003cstrong\u003escrew fastening system\u003c\/strong\u003e that allows multiple segments to be combined and assembled in a modular way, adapting them to the freediver’s anatomical profile and specific needs.\u003c\/p\u003e\n\u003cp\u003eOnce secured, the pieces remain \u003cstrong\u003esemi-mobile\u003c\/strong\u003e, allowing excellent \u003cstrong\u003efluidity of vertebral movement\u003c\/strong\u003e without limiting the spine’s natural flexibility during the dive.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eColor: White\u003c\/li\u003e\n\u003cli\u003eMaterials selected to ensure \u003cstrong\u003emechanical strength\u003c\/strong\u003e and durability in underwater environments\u003c\/li\u003e\n\u003cli\u003eComplete with pin and screw for fastening, for precise and secure assembly\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56927027298649,"sku":"0ACC4005W","price":25.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/C4_segmento_Collare-Dyno-Red-280g.png?v=1767439308"},{"product_id":"segmento-grigio-per-collari-c4-tipo-c","title":"Type C Segment for C4 Collars - Gray","description":"\u003ch2\u003e380-Gram Segment for C4 Freediving Neck Weights\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003e380-gram segment\u003c\/strong\u003e is designed for both \u003cstrong\u003eC4 neck weights\u003c\/strong\u003e, \u003cstrong\u003eDyno and D\u0026amp;D,\u003c\/strong\u003e a technical device dedicated to freedivers. Made from durable materials and finished in gray, the segment integrates into the modular system to provide a customizable and functional solution during freediving activity.\u003c\/p\u003e\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew fastening:\u003c\/strong\u003e The system allows multiple segments to be combined, enabling a configuration that can be adapted to the individual needs of the freediver.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSemi-mobile movement:\u003c\/strong\u003e Once fastened, the segments retain a degree of mobility, following the natural alignment of the vertebrae and ensuring no limitations to spinal movement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial and weight:\u003c\/strong\u003e The segment weighs 380 grams, offering a good balance between strength and lightness, ideal for not weighing down posture during the dive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Gray, for a clean look and good integration with spearfishing equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package:\u003c\/strong\u003e The product is supplied with axle and screw for immediate attachment to C4 neck weights.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFunctionality and Benefits\u003c\/h3\u003e\n\u003cp\u003eThe modular, semi-moving design of the segment is intended to preserve the \u003cstrong\u003efreedom of movement\u003c\/strong\u003e of the spine during freediving, reducing possible discomfort or restriction. 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This feature improves comfort during the dive, maintaining balanced and stable trim in the water.\u003c\/p\u003e\n\u003cp\u003eThe system’s \u003cstrong\u003emodularity\u003c\/strong\u003e allows the freediver to precisely customize weight distribution according to diving style and specific conditions, optimizing underwater efficiency and maneuverability.\u003c\/p\u003e","brand":"C4","offers":[{"title":"Default Title","offer_id":56927050072409,"sku":"0ACC4FG","price":20.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/Segmento_1_Kg_per_Collari_C4_-_Grigio.png?v=1782065437"},{"product_id":"collare-c4-dyno-4kg-bianco","title":"Dyno Collar 4kg - White","description":"\u003ch2\u003eC4 Dyno Neck Weight 4.0 kg for Freediving\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eDyno Neck Weight\u003c\/strong\u003e \u003cstrong\u003e4.0 kg\u003c\/strong\u003e is a modular weight system designed specifically for spearfishing and freediving by C4. Its highly \u003cstrong\u003ehydrodynamic\u003c\/strong\u003e design minimizes bulk and distributes weight ergonomically, helping avoid overloading the neck while swimming underwater.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHydrodynamic shape\u003c\/strong\u003e engineered to optimize force transmission and reduce water resistance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSemi-mobile segments\u003c\/strong\u003e that follow the natural movement of the thoracic vertebrae, ensuring full joint freedom and comfort during dives.\u003c\/li\u003e\n  \u003cli\u003eModular segments with variable weight, secured with screw pins for quick and easy assembly.\u003c\/li\u003e\n  \u003cli\u003eOption to customize the load by adding 280 g Dyno segments, sold separately.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResistant\u003c\/strong\u003e and durable materials to ensure stability and reliability in saltwater.\u003c\/li\u003e\n  \u003cli\u003eAvailable color: white.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBenefits for Freedivers and Spearfishers\u003c\/h3\u003e\n\u003cp\u003ePositioning the weight close to the body’s center of gravity helps effectively balance buoyancy forces, improving stability in the water and the fluidity of the \u003cstrong\u003efin kick\u003c\/strong\u003e. 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