C4

C4 Martian Black Cam Mask with Plasma Antifog treatment

The C4 Martian Black Cam mask is designed for freediving and spearfishing, providing a medium internal volume ideal for efficient equalization during dives.

The design features a wide field of view for optimal underwater visibility, while the soft hypoallergenic silicone skirt ensures comfort and a perfect facial seal, reducing water leaks.

The tempered glass lenses, with a dual plasma treatment, provide a permanent hydrophilic surface that prevents fogging, maintaining clear visibility throughout the entire dive.

Standard Cordura C4 Fin Bag

The Standard Cordura Fin Bag by C4 is made from waterproof ripstop nylon, ensuring mechanical strength and long-lasting durability, even in underwater environments.

Designed as a bag/backpack, it allows you to easily carry your fins and part of your freediving and spearfishing gear, optimizing space and practicality.

Main features

• Cordura structure resistant to tensile stress and abrasion
• Dedicated external pocket for storing a mask, snorkel, or other essential freediving accessories
• Versatile design that combines functionality and comfort while traveling

This bag is ideal for freedivers and spearfishers who need a reliable storage solution for transporting their specialized gear, maintaining a balance between compactness and carrying capacity.

C4 Anatomical Insoles for Freediving and Spearfishing

The C4 anatomical insoles are specifically designed for freediving and spearfishing users, with special attention to shape, design, and materials to improve comfort and performance in the water.

The anatomical structure of the insoles helps reduce empty spaces inside the foot pockets, often caused by the symmetrical shape of the right and left foot. Without dedicated insoles, these spaces can lead to reduced fit and heat loss.

Technical Features and Benefits

• Comfort and fit: the insoles help support the plantar arch, ensuring a precise, stable fit inside the foot pocket and reducing fatigue during finning.
• Improved finning control: the better fit allows more efficient transfer of propulsive force, optimizing thrust and fin responsiveness during freediving.
• Thermal insulation: reducing empty spaces limits the flow of cold water, keeping the foot at a more stable temperature and reducing the risk of muscle cramps in the water.
• Compatibility: perfectly adaptable to C4 foot pockets and suitable for use with most foot pockets on the market, thanks to the option to trim them along predefined lines.

Size Specifications

The C4 insoles are available in three size ranges, covering a wide range of usable Sizes:

• 38-41
• 41-43
• 44-47

The insole can be shaped along the pre-marked cutting line to achieve a custom size and optimal fit inside the foot pocket.

C4 Universal Stainless Steel Bracket

The C4 universal bracket is made of stainless steel, ensuring high mechanical strength and durability in the marine environment. This material provides robustness and long service life without corrosion, an essential feature for spearfishing and freediving equipment.

Designed to provide stability and easy installation, the bracket can be fitted quickly and securely, allowing efficient assembly of underwater components.

Compatibility and Use

• Compatible with all C4 slides, enabling a modular and versatile system for spearguns and accessories.
• Universal system suitable for various configurations in freediving and spearfishing equipment.

C4 Universal Stainless Steel Slide

The C4 universal slide is made with the same stainless steel as the bracket, ensuring consistent strength and corrosion protection.

It allows components to be fastened with precision and solidity, ensuring stable tracking and balanced trim for the spearfishing gun.

Compatibility

• Compatible with all C4 brackets, making it easy to adapt and customize underwater configurations.

C4 Dyn Socks in High-Modulus Thermoplastic Polyethylene

The C4 Dyn socks are made from high-modulus thermoplastic polyethylene, a waterproof and cut-resistant material specifically designed for freediving and spearfishing. This choice provides effective protection against water and abrasive agents, ensuring long-lasting durability in fresh and salt water.

Technical features and functionality

• Material: high-modulus thermoplastic polyethylene, waterproof and cut-resistant.
• Non-slip sole to ensure stability when using the fin.
• Ankle reinforcement that keeps the sock snug and prevents the fin from accidentally slipping during finning.

Use and versatility

These socks are versatile and suitable for use both in the pool and at sea. They can be used:

• as substitutes for neoprene socks in warm waters, offering comfort and protection without excessive thermal insulation;
• as oversocks over 2.0 or 3.0 mm neoprene socks in cold waters, to increase thermal insulation while maintaining freedom of movement.

Available Sizes

The C4 Dyn socks are available in five sizes to ensure a precise and functional fit:

• XS
• S
• M
• L
• XL

C4 Compression 0.5 mm Open-Heel Socks

Socks designed specifically for use with open-heel freediving fins, ideal for those who need sensitivity, precision, and continuous thrust during finning. They are made from 0.5 mm pre-compressed neoprene, with a smooth outer surface and lined interior to ensure an optimal balance between protection and direct contact with the foot pocket.

The construction incorporates internal taping that reinforces the seams, ensuring the durability of the bonding and long-term stability. The low-profile design reduces bulk while maintaining excellent movement feedback and improving comfort and control during use in the water.

Available Sizes

• S: 35–38
• M: 39–42
• L: 42–44
• XL: 45–47

FLOW PLASTIC Nose Clip for Freediving

The FLOW PLASTIC is a freediving nose clip made from PEEK (Polyether ether ketone), a thermoplastic polymer with high technical performance. This material stands out for its high mechanical strength, excellent chemical stability, and full biocompatibility. PEEK gives the nose clip lightness and durability, maintaining consistent performance even after intensive use, making it a valid technical alternative to traditional metals.

Design and Ergonomics

The FLOW PLASTIC features semi-spherical nose pads and optimized dimensions, designed to ensure excellent grip and effective adaptability to different nose shapes. This combination provides a stable and comfortable seal, essential during long dives in freediving and spearfishing activities.

Comfort Customization

Like the ZETA range, the nose clip comes with four types of soft rubber pads, easily interchangeable for proper adjustment of comfort and grip:

• Rounded or flat pads
• Surfaces with raised dots or cross-grooves

Technical Features

The compact design and ergonomics of the FLOW PLASTIC prioritize reduced bulk and hydrodynamics, allowing for maximum seal and stability even at depth and during repeated underwater movements.

Colors and Included Accessories

The nose clip is available in black, white, and blue. The product is delivered complete with:

• Protective case for transport and storage
• Dedicated lanyard, easily replaceable for greater practicality

Nose Clip ZETA PLASTIC

The ZETA PLASTIC is a freediving nose clip made from PEEK (polyether ether ketone), a thermoplastic polymer known for its excellent mechanical, chemical, and biocompatibility properties. This material gives the nose clip high strength, low weight, and consistent structural stability even under intensive use, making it a valid technical alternative to the metals commonly used in underwater equipment.

As with the aluminum version, the Nose Clip ZETA PLASTIC comes with four types of soft rubber pads, fully interchangeable, to ensure optimal comfort adjustment and a personalized fit. The available pads are:

• Domed or flat
• Raised dot surface or cross-grooved surface

This configuration allows complete customization based on nose shape and individual sensitivity, ensuring an effective seal during dives

The nose clip design prioritizes ergonomics and hydrodynamics through a compact design that provides secure closure stability and minimal bulk, essential for reducing drag in the water and maintaining comfort even at greater depths.

The Nose Clip ZETA PLASTIC is available in black, white, and blue and is supplied with:

• Protective case for transport
• Dedicated lanyard, easily replaceable

Single Blade Umberto Pelizzari - Sideral

The Sideral single blade, designed in collaboration with Umberto Pelizzari, is available in the Soft - 25 stiffness version. This feature provides an optimal balance between flexibility and thrust, essential for a smooth, responsive fin stroke during freediving or spearfishing.

The choice of material and selected stiffness deliver efficient power transfer without overloading the leg, improving energy management and stability in the water.

Single Blade Umberto Pelizzari - Aurea

The single Aurea blade, designed in collaboration with Umberto Pelizzari, is available in Soft - 25 stiffness, ideal for those who prioritize a fluid finning stroke and good adaptability when spearfishing.

This blade offers a balance of responsiveness and comfort in power transfer, optimizing efficiency in the water and reducing muscle fatigue during freediving descents.

Single Blade Umberto Pelizzari

The single blade Umberto Pelizzari is specifically designed for freediving and spearfishing, ensuring efficient power transfer and a smooth fin stroke. Available in two different stiffness levels, it lets you choose the ideal rigidity based on your needs for comfort and responsiveness in the water.

C4 Meltemi Snorkel for Freediving and Spearfishing

The C4 Meltemi snorkel is designed specifically for freedivers and spearfishers, with standard dimensions and optimized shapes to promote optimal airflow during dives.

The tube is made from buoyant thermoplastic materials, combining two different hardness levels to ensure maximum adaptability and comfort. The central section is semi-rigid and slightly flattened to improve hydrodynamics, while the upper section is made from soft material for greater flexibility.

The anatomical Snorkel is molded from hypoallergenic silicone, ensuring comfort and durability even during extended use. All materials used are soft, buoyant, and feature high elastic recovery, optimizing fit and practicality in the water.

Main Technical Features

• Dual-hardness tube: semi-rigid central section and soft upper section
• Buoyant thermoplastic materials for better handling in the water
• Hypoallergenic silicone Snorkel with ergonomic bite
• High elastic recovery to maintain shape and comfort
• Available in four colors: Black, Carbon Look, Camo Med, Camo Ocean

Applications

Meltemi is ideal for Freediving and spearfishing, offering excellent ergonomics and breathing comfort, essential for reducing fatigue and improving the freediving descent phase.

C4 Martian Black Antifog Freediving Mask

The C4 Martian Black Antifog freediving mask is designed to deliver optimal comfort and functionality during freediving and spearfishing. Its medium internal volume effectively reduces equalization effort, improving ease of descent.

A natural fit is ensured by the soft hypoallergenic silicone, which provides an excellent seal and comfort even during extended dives. The mask design offers a wide, unrestricted panoramic field of view, essential for control and orientation underwater.

The Plasma Antifog technology applied to the lenses features a dual plasma treatment that creates a permanent hydrophilic surface. This method completely eliminates fogging without the need for sprays or films, ensuring consistently clear, uninterrupted visibility.

The lenses are made of tempered glass for impact resistance and long-lasting durability. They are also interchangeable via practical lens-retaining rings, allowing the installation of prescription lenses for users who require vision correction during underwater activity.

C4 Marseille Belt for Freediving and Spearfishing

The C4 Marseille belt is designed specifically for the needs of freedivers and spearfishers, ensuring durability and functionality in the marine environment.

Materials and Durability

The belt is made from extruded silicone, a material chosen for its superior resistance to the degrading agents typical of underwater environments, such as salt and UV rays. Silicone maintains its integrity and flexibility at temperatures from -70°C to +200°C, offering longer service life than traditional rubber belts.

The Marseille-style quick-release buckle is made from Nylon and thermoplastic POM, materials known for their high mechanical strength and reliability during freediving and spearfishing use.

Technical Features

• Length: 145 cm
• Height: 50 mm
• Thickness: 4.0 mm
• Maximum supported elongation: up to 670%
• Belt material: high-elasticity silicone
• Buckle material: Nylon and thermoplastic POM

Design and Comfort

The choice of silicone gives the belt remarkable elasticity, resulting in optimal comfort during dives and underwater movement. The Marseille buckle allows fast, secure fastening, making adjustment easy even with gloves or in low-visibility conditions.

Color Availability

The belt is available in 5 color options: Black, White, Brown, Silver, and Gold, allowing customization to match the user’s preferences and compatibility with freediving or spearfishing gear.

C4 Marseillaise Belt for Freediving and Spearfishing

The C4 Marseillaise belt is designed specifically for the needs of freedivers and spearfishers, ensuring durability and functionality in the marine environment.

Materials and Durability

The belt is made from extruded silicone, a material chosen for its superior resistance to the deteriorating agents typical of the underwater environment, such as salt and UV rays. Silicone maintains its integrity and flexibility at temperatures from -70°C up to +200°C, providing a longer service life compared to traditional rubber belts.

The Marseillaise-style quick-release buckle is made from Nylon and thermoplastic POM, materials known for their high mechanical strength and reliability during underwater use.

Technical Features

• Length: 145 cm
• Height: 50 mm
• Thickness: 4.0 mm
• Maximum supported stretch: up to 670%
• Belt material: high-elasticity silicone
• Buckle material: Nylon and thermoplastic POM

Design and Comfort

The use of silicone gives the belt remarkable elasticity, resulting in optimal comfort during descents and underwater movement. The Marseillaise buckle provides fast, secure fastening, making adjustment easy even when wearing gloves or in low-visibility conditions.

Available Colors

The belt is available in 5 color options: Black, White, Brown, Silver, and Gold, allowing customization to suit the user’s preferences and compatibility with freediving and spearfishing gear.

C4 Marseille Belt for Freediving and Spearfishing

The C4 Marseille belt is designed specifically for the needs of freedivers and spearfishers, with particular attention to materials and durability in the marine environment.

Materials and Technical Features

The belt is made from extruded silicone, a material that provides high elasticity and superior resistance compared to traditional rubber belts. Silicone maintains its mechanical properties across a wide temperature range, from -70°C to +200°C, and is less prone to deterioration caused by UV rays and saltwater.

The quick-release buckle, “Marseille” style, is made from POM thermoplastic material (Nylon), ensuring strength and reliability during use and fast-release operations.

Dimensions

• Length: 145 cm
• Height: 50 mm
• Thickness: 4.0 mm

Strength and Elasticity

The silicone allows the belt to withstand elongation up to 670% without compromising performance, ensuring a secure, stable fit during freediving and spearfishing.

Available Colors

• Black
• White
• Brown
• Silver
• Gold

Benefits for Freediving and Spearfishing

Compared to traditional rubber belts, this belt offers better long-term durability and greater reliability in saltwater. The elasticity of the silicone helps maintain proper buoyancy trim and ensures comfort during dives, while the Marseille buckle makes fastening and release operations practical and safe.

C4 Marseille Belt for Freediving and Spearfishing

The C4 Marseille belt is specifically designed for freediving and spearfishing, with materials and features engineered to withstand the demands of breath-hold diving.

Materials and Durability

The belt is made from extruded silicone, which provides superior resistance compared to traditional rubber commonly used in freediving belts. Silicone offers high elasticity and remains stable across a wide temperature range (from -70°C to +200°C), effectively resisting saltwater exposure and UV rays.

This material ensures longer service life and better performance in marine environments, maintaining elasticity and strength over time.

Quick-Release Buckle

The “Marseille-style” buckle is made from POM thermoplastic material (Nylon), selected for its mechanical strength and light weight, providing a practical and secure quick release during the dive.

Dimensions and Variants

• Length: 145 cm
• Height: 50 mm
• Thickness: 4.0 mm
• Maximum elongation: 670%
• Available colors: Black, White, Brown, Silver, Gold

Technical Applications

The C4 Marseille belt stands out for its combination of elasticity and resistance to marine elements, ensuring a stable and comfortable fit around the body during freediving or spearfishing sessions. Easy adjustment and the buckle’s quick release enhance practicality in the water.

C4 Marseillaise Belt for Freediving and Spearfishing

The C4 Marseillaise belt is designed specifically for freediving and spearfishing, ensuring durability and reliability in the marine environment.

Materials and Strength

The belt is made from extruded silicone, a material that outperforms traditional rubber in elasticity and mechanical strength. Silicone maintains high resistance to extreme temperatures, ranging from -70°C to +200°C, and is effectively protected against the corrosive effects of salt water and UV rays.

The “Marseillaise” style buckle is made from POM thermoplastic and Nylon, providing a reliable, durable quick-release system.

Technical Features

• Length: 145 cm
• Height: 50 mm
• Thickness: 4.0 mm
• Maximum elongation: 670%
• Available colors: Black, White, Brown, Silver, Gold

In-Water Benefits

Silicone provides high elasticity, improving comfort when wearing the belt during freediving sessions or spearfishing trips. In addition, its superior resistance to saline conditions and prolonged sunlight exposure ensures long service life without deterioration.

The quick-release buckle provides practicality and safety during underwater maneuvers, making it easier to adjust and fit the belt to the freediver’s body.

C4 Martian Freediving Mask

The Martian mask by C4 is specifically designed for freediving and extended underwater sessions, ensuring comfort and functionality throughout your time underwater.

The skirt is made from soft hypoallergenic silicone, able to adapt perfectly to different face shapes, ensuring a watertight seal without compromising comfort.

The design incorporates a medium internal volume combined with a wide field of view, key features for reducing effort during equalization and improving visual perception underwater.

The lenses are made from ultra-clear tempered glass, ensuring optical clarity and mechanical resistance. The traditional assembly with lens-retaining rings allows easy replacement, including the option to install custom optical lenses.

The ergonomic, adjustable strap is also made from soft silicone, designed to adapt perfectly to the shape of the head and keep the mask stable during spearfishing.

In addition, the Martian mask is equipped with an Action Cam mount, ideal for those who want to record their dives without compromising the mask’s fit or functionality.

Main technical features:

• Soft, hypoallergenic silicone skirt for comfort and adaptability
• Medium internal volume for easier equalization while freediving
• Wide field of view for improved underwater visibility
• Adjustable anatomical silicone strap
• Ultra-clear tempered glass lenses with traditional lens-retaining ring assembly
• Compatible with replaceable optical lenses
• Integrated mount for Action Cam attachment

Naifu S arm Knife for freediving and spearfishing

The Naifu S is an arm Knife designed with an ergonomic shape specifically developed for the needs of freedivers and spearfishers. The 66.5 mm blade is made from AISI420B stainless steel with vacuum heat treatment at 1020°C and nitrogen cooling at 20 atm, ensuring high hardness and mechanical strength while maintaining a long-lasting edge.

The blade shape includes an integrated line cutter, while its internal tang runs the full length of the handle, ensuring rigidity and effective thrust transfer during underwater use.

Materials and technical features

• Handle and sheath made from POM acetal resin, a rigid, recyclable plastic material with low moisture absorption and anti-friction properties that improve comfort and handling in the water.
• Colors: white handle, black sheath for easy recognition in the water.
• Total length Knife: 144 mm.
• Attachment with central retaining tooth that works both when locking and releasing, making extraction quick and safe during use.

Accessories and attachment

• Equipped with two rubber straps with stainless steel loops for stable attachment to the leg or arm, ensuring comfort and safety during spearfishing.
• Sheath with rear hole for optional anchoring of an additional elastic cord, increasing Knife stability during descent and retrieval.

Specific applications

The Naifu S is ideal for freediving and spearfishing, thanks to its combination of materials resistant to marine corrosion, compact design, and technical solutions engineered to ensure practicality, durability, and safety while diving.

Single Speargun Bag C4 for Spearfishing

The Single Speargun Bag C4 is specifically designed for the safe, practical transport of a single speargun. Made from Nonwoven material, it provides water and tear resistance, ensuring optimal protection when moving around in marine environments.

The design features a side zipper with single slider, making it easy to insert and remove the speargun and improving efficiency during in-water operations. The bag also includes an adjustable strap for shoulder carry, offering comfort and practicality while on the move.

Technical Features

• Material: Waterproof, tear-resistant Nonwoven
• Capacity: Single speargun
• Closure: Side zipper with single slider
• Shoulder strap: Adjustable strap for shoulder carry
• Availability: Two lengths - 150 cm and 170 cm

Model 170 dimensions

• Length: 170 cm
• Width: 21 cm

C4 Carbon 300 Foot Pockets for Freediving and Spearfishing

The 300 Foot Pockets represent an innovation in Freediving and spearfishing equipment by C4 Carbon. Their name comes from their low weight, just over 300 grams, which helps significantly reduce fatigue during underwater finning.

Technical Features and Materials

Made with an innovative material that provides mechanical strength seven times higher than traditional materials, these foot pockets combine lightness and toughness without compromising durability. The internal volume has been optimized to ensure high ergonomics, minimizing thickness in contact with the foot, improving comfort and adaptability during the dive.

Anatomy and Comfort

The anatomy of the 300 Foot Pockets provides a unique fit, achieved by overlapping the shapes of the anatomical Mustang shoes, with a third-degree pre-forming that increases their effectiveness. Energy transfer is distributed evenly across the entire contact surface, preventing irritation points or stiffness. This allows for better blade stability during the kick, with reduced pain and greater propulsion efficiency.

Hydrodynamics and Design

The design of the 300 Foot Pockets is aimed at minimizing hydrodynamic drag: the lines are fluid and continuous, with no steps or interruptions, to facilitate water flow. The glossy surface further contributes to smooth glide, optimizing fluid movement in the water and reducing fatigue for the spearfisher.

Technical Specifications

• Weight: approximately 315 grams in size 40-41
• Reduced internal volume for lower energy expenditure during finning
• High mechanical-strength material
• Snug anatomical fit with 3° pre-forming
  
• Available colors: Black, White, and Silver

Use and Compatibility

The foot pockets are designed for use with blades from the C4 line, but can also be adapted to other blades using the dedicated kit, to improve thrust transfer and finning efficiency.

Attention: The 300 Foot Pockets are sold as a single piece.

300 C4 Carbon Foot Pockets

The 300 Foot Pockets represent the latest innovation from C4 carbon in footwear for freediving and spearfishing. Weighing just over 300 grams, these foot pockets offer outstanding comfort and an extremely low volume that optimizes hydrodynamics during the fin stroke.

Design and Technical Features

The design of the 300 Foot Pockets is based on a balance between tradition, innovation, and technical functionality, with engineering focused on reducing volume and, consequently, water resistance and effort during movement.

• Reduced internal volume, a key element for minimizing perceived weight in the water
• Actual weight of just 315 grams in size 40-41, about half that of traditional foot pockets (600-750 grams)
• Material with mechanical resistance seven times higher than conventional materials
• Sinking characteristic, functional for trim during freediving and spearfishing

Anatomy and Comfort

The anatomy of the 300 Foot Pockets is derived from the overlapping anatomical shapes of the Mustang foot pockets, with a maintained third-degree pre-forming. The result is a unique, very enveloping fit that effectively distributes energy across the entire contact surface of the foot.

• Minimal thickness in contact with the foot for high adaptability and comfort
• Reduced painful pressure points
• More uniform energy transmission, improving finning efficiency

Hydrodynamics and Design

The shapes of the 300 Foot Pockets are designed to promote a continuous, uninterrupted hydrodynamic flow, eliminating steps and surface breaks. This results in a significant reduction in drag in the water and consequently less fatigue.

• Smooth, glossy surfaces for optimal glide while diving
• Design inspired by the natural efficiency of aquatic forms

Additional Details

• Colors: Black, White, and Silver
• Sold individually
• Compatible with C4 line blades or adaptable via kit to blades from other brands to improve thrust transmission

C4 Carbon 300 Foot Pockets for Freediving and Spearfishing

The 300 Foot Pockets are an innovation in freediving and spearfishing equipment by C4 Carbon. Their name comes from their low weight, just over 300 grams, which helps significantly reduce fatigue during underwater finning.

Technical Features and Materials

Made from an innovative material that provides mechanical strength seven times greater than traditional materials, these foot pockets combine lightness and strength without compromising durability. The internal volume has been optimized to ensure high ergonomics, minimizing thickness in contact with the foot, improving comfort and fit adaptability during the dive.

Anatomy and Comfort

The anatomy of the 300 Foot Pockets provides a unique fit, achieved by overlapping the shapes of the Mustang anatomical shoes, with third-degree preforming that increases their effectiveness. Energy transfer is distributed evenly across the entire contact surface, preventing irritation points or stiffness. This allows better blade stability during the kick, with reduced pain and greater propulsion efficiency.

Hydrodynamics and Design

The design of the 300 Foot Pockets is aimed at minimizing hydrodynamic drag: the lines are smooth and continuous, with no steps or interruptions, to help water flow. The glossy surface further enhances glide, optimizing fluid movement in the water and reducing fatigue for the spearfisher.

Technical Specifications

• Weight: approximately 315 grams in size 40-41
• Reduced internal volume for lower energy expenditure during finning
• High mechanical-strength material
• Snug anatomical fit with 3° preforming
• Available in 3 sizes: 38/39, 42/43, 44/45
• Available colors: Black, White, Blue, Brown, Silver

Use and Compatibility

The foot pockets are designed for use with C4 line blades, but can also be adapted to other blades with the dedicated kit, improving thrust transfer and finning efficiency.

Warning: The 300 Foot Pockets are sold as a single piece.

Neoprene Mask Cover for Freediving and Spearfishing

The Neoprene mask cover is designed specifically for freediving and spearfishing, providing effective coverage for the head and face. It reduces water ingress inside the mask, improving the seal and comfort during dives.

Technical Features

• Camouflage fringes that replicate aquatic vegetation, ensuring dynamic, natural camouflage that adapts to the spearfisher’s movements in the water.
• Elastic support base under the nose designed to seal one of the main water entry points into the mask, increasing the effectiveness of the protection.
• Neoprene material that ensures elasticity and comfort, maintaining a snug fit without limiting facial mobility.

Benefits for Freediving and Spearfishing

This mask cover improves underwater camouflage efficiency, essential for approaching fish without being detected. Reduced water ingress supports better buoyancy stability and greater breathing comfort thanks to the perfect mask seal.

The elasticity of Neoprene and ergonomic design allow an optimal fit on different mask models, making it easier to use during extended freediving dives.

Neoprene Zero C4 Socks for Freediving and Spearfishing

The Neoprene Zero socks by C4 are designed with careful attention to the specific anatomy of the right and left foot, ensuring a precise and comfortable fit. The construction uses three selected technical materials to provide an optimal balance of stretch, thermal protection, and mechanical resistance.

Materials and Construction

• Instep: stretch fabric that promotes comfort and freedom of movement during finning
• Toes: warm, cut-resistant material to effectively protect the extremities from cold and abrasion
• Sole and heel: non-slip reinforcements provide stable grip and increased durability in underwater environments

Technical Specifications

• Available thicknesses: 1.5 mm and 3.0 mm, suitable for different temperatures and diving conditions
• Available Sizes: XS, S, S/M, M, L, XL, XXL, for a precise, customized fit

Functional Features

The differentiated construction and materials used ensure a sock that is durable yet comfortable, essential for keeping the foot warm during freediving and spearfishing. The non-slip inserts improve stability and safety when walking and in the water.

Naifu S Arm Knife for Freediving and Spearfishing

Naifu S is an arm knife designed with an ergonomic shape to ensure comfort and practicality during freediving and spearfishing activities.

Blade Technical Features

The blade, 66.5 mm long, is made from AISI420B stainless steel, known for its combination of strength and hardness. The blade is extremely sharp and includes an integrated line cutter. Its internal structure extends along the entire length of the handle, ensuring optimal rigidity and greater reliability in the water.

The blade heat treatment involves vacuum hardening at 1020°C, followed by nitrogen cooling at 20 atm, to improve hardness and mechanical strength.

Handle and Sheath

The handle and sheath are made from recyclable POM acetal resin, a plastic material characterized by high rigidity, low moisture absorption, and anti-friction properties, ideal for use in underwater environments.

The knife measures 144 mm in overall length, ideal for ensuring control and safety. The locking system uses a central retaining tooth that makes both fastening and release easier, improving practicality and speed of extraction during the dive.

Fastenings and Accessories

• Equipped with two rubber straps with stainless steel loops for fastening to the arm or leg, ensuring stability during underwater activity.
• The sheath features a rear hole for optional bungee mounting, increasing fastening and safety options.

Technical Specifications

• Blade material: AISI420B stainless steel
• Blade length: 66.5 mm
• Overall length: 144 mm
• Handle and sheath color: Black

280-Gram Segment for Dyno C4 Neck Weight Specifically for Freediving

The segment is designed for the Dyno C4 neck weight, a device developed exclusively for the needs of spearfishing and freediving.

Made with a lightweight 280-gram structure, it ensures optimal load management without affecting underwater mobility.

Attachment System and Functionality

The segment uses a screw fastening system that allows multiple segments to be combined and assembled in a modular way, adapting them to the freediver’s anatomical profile and specific needs.

Once secured, the pieces remain semi-mobile, allowing excellent fluidity of vertebral movement without limiting the spine’s natural flexibility during the dive.

Technical Features

• Color: White
• Materials selected to ensure mechanical strength and durability in underwater environments
• Complete with pin and screw for fastening, for precise and secure assembly

C4 Scirocco Snorkel for Freediving and Spearfishing

Scirocco is a snorkel designed specifically for freediving and deep spearfishing, also ideal for pool training thanks to its shorter tube compared to the Meltemi model.

Technical Features

• Reduced-size tube to minimize vibration and stale-air buildup, improving breathing during spearfishing.
• Made from floating thermoplastic materials with two different hardness levels: the central section is made from slightly flattened semi-rigid material, while the upper section is made from soft material to optimize comfort and ergonomics.
• Anatomical mouthpiece molded in hypoallergenic silicone, ensuring comfort and durability even during extended use.
• All materials used are soft, floating, and feature extremely high elastic recovery, ensuring flexibility and adaptability to the shape of the mouth.
• Available in two technical color options: Black and Carbon Look.

Benefits for Freedivers and Spearfishers

The compact structure and advanced materials ensure smoother breathing and greater comfort during dives. The combination of different hardness levels in the tube improves the snorkel’s comfort and stability, reducing fatigue and making breath management easier underwater.

Adaptability and Practicality

The ergonomic design and hypoallergenic silicone mouthpiece allow continuous use without irritation, making Scirocco a reliable snorkel for extended freediving sessions or deep-water spearfishing activities.

C4 Meltemi Snorkel for Freediving and Spearfishing

Meltemi by C4 is a standard-size snorkel specifically designed to optimize airflow during freediving and spearfishing.

The tube is made from buoyant thermoplastic materials, combining two different hardness levels to provide the ideal balance between rigidity and flexibility. The slightly flattened central section is made from semi-rigid thermoplastic material to maintain its shape and improve airflow, while the upper section uses a soft material that enhances ergonomics and ease of handling in the water.

The mouthpiece features an anatomical bite made from high-quality hypoallergenic silicone, selected to provide comfort and durability during extended use. All materials used are soft, buoyant, and offer excellent elastic recovery, ensuring flexibility and durability without compromising practicality during dives.

Technical Features

• Tube made from dual-hardness thermoplastic materials to optimize comfort and functionality
• Anatomical bite in hypoallergenic silicone for excellent comfort and durability
• Soft, buoyant materials with high elasticity and resistance
• Ergonomic design to improve underwater breathing and reduce bulk

Color Variants

• Black
• Carbon Look
• Camo Med
• Camo Ocean

280-Gram Segment for C4 Dyno Freediving Neck Weight

This 280-gram segment is designed specifically for the C4 Dyno neck weight, a technical device dedicated to freedivers. Made from durable materials and finished in black, the segment integrates into the modular system to provide a customizable and functional solution during freediving activities.

Technical Features

• Screw fastening: The system allows multiple segments to be combined, enabling a configuration that adapts to the individual needs of the freediver.
• Semi-mobile movement: Once fastened, the segments retain a degree of mobility, following the natural curve of the vertebrae and ensuring no restrictions on spinal movement.
• Material and weight: The segment weighs 280 grams, offering a good balance between durability and lightness, ideal for avoiding unnecessary load on posture during a dive.
• Color: Black, for a clean, understated look and good integration with spearfishing gear.
• Complete package: The product is supplied with pin and screw for immediate attachment to the C4 Dyno neck weight.

Functionality and Benefits

The modular, semi-moving design of the segment is intended to maintain freedom of movement of the spine during freediving dives, reducing possible discomfort or restriction. The structure allows optimal gear customization, improving comfort and practicality in everyday use.

3 mm Double-lined Neoprene Winter Beanie

The winter beanie is made from 3 mm double-lined Neoprene, a material that provides proper thermal protection during freediving and spearfishing in cold waters.

The double lining increases thermal insulation while maintaining excellent stretch and comfort. The elastic structure allows an ergonomic fit to the shape of the head, ensuring a comfortable fit without restricting movement.

Thanks to the fabric’s light weight and flexibility, the beanie provides an effective barrier against heat loss, improving comfort in the water and helping extend freediving session times.