C4

C4 Dyno Neck Weight 4.0 kg for Freediving

The Dyno Neck Weight 4.0 kg is a modular weight system designed specifically for spearfishing and freediving by C4. Its highly hydrodynamic design minimizes bulk and distributes weight ergonomically, helping avoid overloading the neck while swimming underwater.

Technical Features

• Hydrodynamic shape engineered to optimize force transmission and reduce water resistance.
• Semi-mobile segments that follow the natural movement of the thoracic vertebrae, ensuring full joint freedom and comfort during dives.
• Modular segments with variable weight, secured with screw pins for quick and easy assembly.
• Option to customize the load by adding 280 g Dyno segments, sold separately.
• Resistant and durable materials to ensure stability and reliability in saltwater.
• Available color: white.

Benefits for Freedivers and Spearfishers

Positioning 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 fin kick. Thanks to improved weight distribution and modular adjustability, the Dyno Neck Weight helps maintain a natural posture, reducing fatigue and restrictions in neck and back movement.

Assembly and Customization

1. Remove or add segments according to the desired weight.
2. Secure each segment using the screw pin, ensuring a firm and stable hold.
3. To increase weight, add the supplementary 280 g Dyno segments available separately.
4. Adjust the neck weight so it fits comfortably around the neck without compression.

Ghost C4 Fins for Freediving and Spearfishing

The Ghost fins by C4 represent a technical advancement in the spearfishing and freediving sector, with a design aimed at optimizing thrust and underwater stealth. The blade, made from high-elastic-return transparent technopolymer, offers responsiveness comparable to carbon blades, ensuring smooth and efficient power transfer.

Technical Features

• Blade material: transparent elastic technopolymer for underwater camouflage
• Blade dimensions: 800×195 mm
• Blade Stiffness: Medium
• Water Rails: variable geometry, high-pressure overmolded to improve handling and stability in the water
• Foot Pocket: 250 model, designed to provide comfort and a precise fit
• Available sizes: 36/37, 38/39, 40/41, 41/42, 42/43, 43/44, 44/45, 46/47

Technical Benefits

The transparency of the blade allows perfect camouflage in the underwater environment, reducing visual detection by prey and therefore improving the approach phase during spearfishing. The high elastic return of the technopolymer ensures powerful, energetic thrust while preserving a smooth finning action and the overall lightness of the fin.

The 250 foot pocket is engineered to provide a snug and comfortable fit, allowing excellent control and thermal comfort during the dive. The Ghost fins are the result of years of laboratory testing and field trials by recognized athletes in the spearfishing sector.

Additional Information

• 100% made in Italy product, synonymous with quality and attention to technical detail
• Each pair comes with an information leaflet containing instructions and recommendations for fin maintenance and protection

Dyno Neck Weight 4.0 kg for Freediving – Modular Weight System

The Dyno Neck Weight in 4.0 kg, designed by C4, is a weight system specifically developed for spearfishing and freediving. Its hydrodynamic shape reduces bulk and does not overload the neck during finning, improving efficiency and fluidity of underwater movement.

Design and Comfort

The 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.

Modularity and Weight Customization

The segments, with varying weights, are easy to assemble and disassemble thanks to axles with locking screws. This allows the load to be precisely customized according to the specific needs of the freediver or spearfisher.

• Additional 280-gram Dyno segments available separately to increase weight
• Easy assembly and adjustment according to the dive profile

Technical Features

• Type: modular neck weight system for freediving
• Standard total weight: 4.0 kg
• Shape: optimized for hydrodynamics and neck comfort
• Materials: mechanically strong and durable
• Color: black

Benefits for Freedivers and Spearfishers

The Dyno Neck Weight improves thrust transmission during freediving thanks to the well-distributed weight near the body’s center of gravity. Its modular structure contributes to a customized trim, enabling smoother and less tiring underwater movement, with optimized neck comfort and minimized inertia.

C4 Open Sea 15 – Buoy for Freediving and Spearfishing

The C4 Open Sea 15 is a buoy designed specifically for freediving and spearfishing, delivering maximum practicality, light weight, and durability in marine environments. Made from high-strength PVC and built with dropstitch technology, it offers high structural rigidity while maintaining a compact, highly hydrodynamic profile.

Its essential, lightweight construction ensures excellent glide through the water, significantly reducing drag during towing. The buoy can be inflated up to 1 bar of pressure, ensuring stability and robustness even in demanding sea conditions.

Technical and functional features

• Equipped with 8 stainless steel D-rings, 6 of which are positioned on the underside, ideal for routing the line and securely attaching accessories and specific freediving and spearfishing gear
• Complete with high-visibility flag (30 x 30 cm) for effective signaling in the water
• Includes a breakdown pole measuring 90 cm, useful for positioning the flag
• Supplied with a compact and practical carry bag, making transport and storage easier

Dimensions and technical specifications

• Buoy dimensions: 90 x 28 x 15 cm
• Material: high-strength PVC
• Construction technology: dropstitch
• Maximum inflation pressure: 1 bar
• High-visibility flag: 30 x 30 cm
• Pole length: 90 cm
• 8 stainless steel D-rings

Thanks to its compact dimensions and durable construction, the Open Sea 15 is a functional, easy-to-carry solution for freedivers and spearfishers who need a reliable, safe buoy during sessions at sea.

Undersuit Aurea Lady C4 - Neoprene Glide Skin 2mm

The Aurea Lady Undersuit is made from 2 mm thick Neoprene Glide Skin, with a smooth outer surface and elastic inner lining. This material provides stretch and thermal comfort during use in the water.

The distinctive graphics of the Aurea C4 line stand out for their bright, vibrant colors, while maintaining a technical, functional design suited to the needs of spearfishing and freediving.

Technical features

• 2 mm Neoprene Glide Skin with smooth outer finish for improved hydrodynamics
• Elastic inner lining for greater freedom of movement
• Long sleeves for better thermal protection and coverage
• Black color with gold details, for the signature look of the Aurea line
• Available in sizes XS, S, M, and L for a precise fit

Use

The undersuit can be used as a standalone garment for warm-water dives or pool activities, or as an additional layer under freediving wetsuits to improve thermal comfort and insulation without compromising freedom of movement.

Kit Umberto Pelizzari Limited Edition by C4

The UP Kit by C4 is designed specifically for those starting freediving courses, offering a complete, functional set with a unique gray colorway.

This kit includes selected components to ensure comfort, efficiency, and practicality during freediving and spearfishing sessions.

Kit contents

• Umberto Pelizzari Soft Fins: gray fins that ensure effective thrust transmission and a smooth kick, ideal for developing technique and endurance during freediving.
• Condor Grey Mask: designed to offer low internal volume and an excellent seal, ensuring comfort and a wide field of view during freediving and spearfishing dives.
• Snorkel Meltemi: ergonomic snorkel with an optimized design to make breathing easier, reduce hydrodynamic drag, and increase comfort during surface breathing.
• Mesh Bag: practical and durable, it allows easy transport and quick drying of your gear, making it easier to organize equipment between sessions.

Technical specifications and variants

The kit is available in 8 sizes to fit different foot sizes, ensuring a precise and comfortable fit:

• 36-37
• 38-39
• 40-41
• 41-42
• 42-43
• 43-44
• 44-45
• 46-47

The gray color choice provides a clean, distinctive aesthetic compared to traditional versions.

Single Blade C4 MB001 CAMOSKIN OCEAN

The C4 MB001 CAMOSKIN OCEAN single blade is specifically designed for spearfishing and freediving, offering a balance of lightness and mechanical strength.

Available in two different stiffnesses, this blade lets you adapt the responsiveness of the blade and power transmission according to individual needs and water conditions.

Single Blade C4 MB001 CAMOSKIN MED

The single blade C4 MB001 CAMOSKIN MED is available in two different stiffnesses, allowing a personalized choice based on spearfishing or freediving needs. Made with specific materials to ensure an optimal balance between
responsiveness and thrust transfer, this blade delivers an efficient, fluid kick.

The CAMOSKIN surface promotes better hydrodynamic control, reducing drag during the thrust phase and improving fluidity in underwater movement.

C4 MB002 Single Blade for Freediving and Spearfishing

The C4 MB002 single blade is designed specifically for freediving and spearfishing, delivering highly effective thrust transmission. Made with durable materials, it ensures long-lasting performance and mechanical strength even with frequent dives.

Thanks to its design, engineered to optimize fluid movement, the blade improves responsiveness and efficiency during finning, minimizing muscle fatigue. Advanced hydrodynamics provide smoother, more controlled thrust during descent and ascent phases.

The C4 MB002 blade combines lightness and strength, essential features for ensuring comfort and precision in underwater movements without compromising the power needed for freediving dives.

C4 Aurea Lady Two-Piece Wetsuit for Pure Freediving

The Aurea Lady wetsuit is specifically designed for pure freediving, combining compression resistance with high elastic rebound to ensure maximum freedom of movement and comfort during dives.

Made with an advanced design, the wetsuit skillfully integrates the technical construction of C4 spearfishing suits with high-quality materials, offering an ergonomic fit and optimal feel in the water.

Materials and Construction

• Outer coating composed of glide skin neoprene and open-cell neoprene panels, with a pattern inspired by carbon fibers, improving hydrodynamics and protection against compression.
• Internal lining in ultraspan neoprene, glued and stitched internally to ensure elasticity and mechanical strength over time.
• Reinforced edges on wrists, waist, and ankles to increase thermal sealing and make donning easier while maintaining material durability.

Technical Features

• Available thicknesses: 3.0 mm and 5.0 mm to suit different temperature and depth requirements.
• Available in 5 sizes (1, 2, 3, 4, 5) for a personalized fit.
• Specific men’s and women’s (Lady) versions, designed to accommodate anatomical differences and optimize comfort and mobility.

Functional Details

The jacket features the Easy Lock fastening system, positioned in the beavertail area, allowing quick and secure connection and release between jacket and pants, improving practicality when getting suited up and undressed.

The performance-oriented cut and material combination ensure excellent elasticity and proper compression, essential for a wetsuit designed for freediving and spearfishing, where fluid movement is crucial.

Sideral Man Two-Piece Wetsuit for Pure Freediving

The Sideral Man by C4 is a wetsuit specifically designed for pure freediving, featuring high compression resistance and excellent elastic recovery to ensure comfort and durability while diving.

Materials and Technical Features

• Made with an outer coating that combines glide skin neoprene and open-cell neoprene, optimizing hydrodynamics and mechanical resistance.
• Inner lining in ultraspan neoprene, glued and stitched internally for greater elasticity and durability.
• Reinforcements at the wrists, waist, and ankles improve thermal sealing and make the suit easier to put on, ensuring a good water seal.

Design and Fit

The innovative design integrates the high-performance cut typical of C4 spearfishing wetsuits with premium materials, ensuring a comfortable fit without limiting freedom of movement during descents and finning.

Fastening System

The jacket features the Easy Lock fastening system positioned in the beavertail area, allowing the jacket to be fastened and released quickly, improving practicality in the water and when putting it on.

Versions and Specifications

• Available in 3.0 mm and 5.0 mm thicknesses, to suit different temperature conditions and dive durations.
• Sold as a full set or separately (jacket only or pants only), for greater flexibility when configuring your gear.
• Available in Man and Lady versions, with 5 standard sizes (1-5) for a proper fit.

Single Blade C4 MB001 for Freediving and Spearfishing

The single C4 MB001 blade is specifically designed for freediving and spearfishing, delivering a precise balance of stiffness and flexibility to optimize thrust transmission during the fin stroke.

Available in three stiffness levels, it allows you to select the ideal elasticity based on the diver’s style and personal characteristics, improving comfort and blade responsiveness underwater.

C4 SPORTECH Foot Pockets for Freediving and Spearfishing

The C4 SPORTECH foot pockets are designed specifically for the needs of freedivers and spearfishers, ensuring extended use with particular attention to ergonomics and comfort. Made from silicone, they offer a soft, progressive fit, minimizing pressure points during long in-water sessions.

Design and Technical Specifications

• Open heel: allows greater freedom of movement and makes the foot pocket easier to put on and remove.
• Right/left differentiated anatomical design: derived from the PROTech model, it ensures stable, natural foot positioning, improving trim and power transfer during finning.

Comfort and Compatibility

The SPORTECH foot pockets stand out for their high level of comfort and versatility, making them ideal for frequent, non-competitive use in freediving and spearfishing. They are compatible exclusively with C4 SPORTECH blades, ensuring an optimal pairing and efficient power transfer in the water.

C4 Sideral Lady Wetsuit for Pure Freediving

The Sideral Lady is a two-piece wetsuit designed specifically for pure freediving, featuring a soft construction with high compression resistance and excellent elastic return. Its innovative design combines a technical cut derived from C4 spearfishing wetsuits with superior material quality, ensuring comfort and functionality.

Materials and Construction

• Outer lining made from a combination of glide skin neoprene and open-cell neoprene with a carbon-fiber-effect finish, optimized for freedom of movement and reduced heat loss.
• Internal lining in ultraspan neoprene, glued and internally stitched to increase durability and improve mechanical resistance.
• Wrists, waist, and ankles reinforced with specific edge finishes to ensure greater thermal sealing and make donning and doffing easier with added durability.

Functional Features

• Jacket equipped with the Easy Lock fastening system in the beavertail area, allowing the jacket to be secured and removed easily while improving handling in the water.
• Available as a complete set (jacket + pants), or as individual pieces (jacket only or pants only) to customize your gear.
• Available in two thicknesses: 3.0 mm for milder temperatures and 5.0 mm for greater thermal insulation.
• Available Sizes: 1, 2, 3, 4, and 5, to ensure a precise and comfortable fit.

Available Versions

The Sideral wetsuit is offered in specific versions for men and women (Lady), optimized for body shape and comfort during freediving sessions.

D&D - Deep & Dynamic Neck Weight for Freediving and Spearfishing

The D&D neck weight is a modular ballast system developed by the C4 brand, designed specifically for the needs of freediving and spearfishing, both for deep dives and dynamic apnea. The name Deep & 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.

Technical Features and Materials

The structure is made of lead coated with thermoplastic rubber, a combination that ensures high mechanical strength and durability while maintaining excellent hydrodynamics. The shape of the neck weight is designed to prevent overload on the neck, improving streamlining and comfort during finning.

The 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.

Weight Modularity and Customization

The 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.

It is supplied with numbered plastic segments to make it easier to replace the front weights with lightweight segments, creating different weight configurations. The integrated safety clip prevents accidental loss of the segments during use.

Available Configurations

• 1,6 kg – base version ideal for deep dives
• 3 kg – configuration with 4 rear segments for greater weight in dynamic apnea
• 4 kg – complete neck weight with 5 rear segments for maximum modular ballast

Additional Details

• Base neck weight: 1,6 kg
• Color: white
• Material: lead coated with thermoplastic rubber
• Rear segments available individually or in 4-piece kits
• Can be integrated with 280 gram or 1 kg Dyno segments

D&D Collar - Deep & Dynamic for Freediving and Spearfishing

The D&D Collar, Deep & Dynamic, represents the evolution of the Dyno collar made by the C4 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.

Technical Features

• Made of lead coated with thermoplastic rubber, ensuring mechanical strength and protection against wear
• Highly hydrodynamic design to reduce drag in the water and promote a smooth swimming motion without overloading the neck
• Semi-mobile segments that follow the movements of the thoracic vertebrae, ensuring maximum freedom of movement without restrictions
• Weight distribution concentrated near the balance point of buoyancy forces, improving stability and balance during the dive
• Equipped with safety clips to prevent accidental loss of the segments

Functionality and Modularity

The 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.

Available Configurations

• 1.6 kg collar, suitable for depth freediving
• 3 kg collar with 4 rear segments
• 4 kg collar with 5 rear segments, ideal for dynamic freediving when more ballast is required

Additional Details

• Color: black
• Base weight: 1.6 kg
• Rear segments can be added or replaced by purchasing the 4-piece kit or individual 280 gram Dyno and 1 kg Dyno segments

The D&D 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.

Vertical Carbon C4 Reel for Spearguns

The Vertical Carbon reel by C4 is a vertical reel specifically designed for spearguns used in freediving and spearfishing. Handcrafted in Italy, this reel combines light weight, stiffness, and mechanical strength, ensuring high reliability underwater.

Materials and Construction

The load-bearing frame and spool are made through monocoque molding in carbon fiber, ensuring excellent stiffness while minimizing overall weight. The spool is also laser-cut, providing the precision and balance needed for efficient power transfer during retrieval.

The drag and rewind knobs are made from glass-fiber-reinforced polypropylene, a material chosen for its durability and light weight. The line guide arm is made of stainless steel, ensuring corrosion resistance and strength during use in the marine environment.

Technical Features and Functionality

• Drag mechanism designed to prevent the spool from locking completely, allowing smooth and safe retrieval even in challenging spearfishing situations.
• Versatile mounting: the reel comes with a bracket for traditional installation, but it can also be mounted directly on the trigger guard handle, offering practicality and customization for specific needs.
• Spool capacity: 50 meters of line with a 1.5 mm diameter, an ideal size for ensuring a good balance between capacity and handling underwater.

Applications

The Vertical Carbon C4 reel is suitable for spearfishers and freedivers using spearguns, providing reliable technical support for fast, safe retrievals. The combination of technical materials and carefully engineered design ensures smooth rotation and resistance to wear in the underwater environment.

Undersuit Aurea - Lady C4

The Undersuit Aurea - Lady is made from 2 mm thick Neoprene Glide Skin, with a smooth outer surface and an elastic inner lining that ensures excellent stretch and comfort during use in the water.

Designed sleeveless, this undersuit offers good freedom of movement in the upper body, making it ideal both as a warm-water or pool wetsuit shorty and as an undersuit to wear under freediving wetsuits to improve thermal insulation and fit.

The Aurea line by C4 stands out for its bright, vivid graphics, with a black and gold combination that gives the product an aesthetic specifically suited to spearfishing and freediving.

Technical features

• Neoprene Glide Skin 2 mm: optimal thickness for thermal insulation and lightness
• Elastic inner lining: maximizes comfort and freedom of movement
• Smooth exterior: improves trim and reduces drag in the water
• Sleeveless model: greater fluidity in finning and gun tracking movements
• Black-gold colorway: distinctive design and visibility
• Available in sizes XS, S, M, L: fit suitable for different body types

Use

The Aurea Lady undersuit is suitable for use as a lightweight wetsuit in warm water or the pool, or as an additional layer under freediving wetsuits to enhance thermal insulation while maintaining flexibility and comfort during freediving and deep spearfishing.

Pair of Sportech Fiberglass Blades

This pair of Sportech blades is made from fiberglass, a material known for its excellent combination of elasticity and mechanical strength. The blades are specifically designed for spearfishing and freediving, ensuring effective power transfer in the water.

They are available in two different stiffness levels, allowing you to choose according to personal preferences in terms of responsiveness and efficiency during finning. The range of stiffness options helps optimize smooth movement and comfort during dives.

Sportech fiberglass Blades

The pair of Sportech blades is made from fiberglass, a material known for its mechanical strength and its ability to combine light weight with long-lasting durability. Available in two different stiffness levels, these blades ensure optimal thrust transmission during finning.

Choosing the most suitable stiffness allows you to adapt responsiveness and movement efficiency in the water to the specific needs of freediving and spearfishing, improving control and fluidity throughout the underwater kick cycle.

Extreme Camo C4 Wetsuit for Freediving and Spearfishing

Extreme Camo by C4 is a wetsuit made from open-cell neoprene with an elastic external camouflage lining, specifically designed to meet the needs of freedivers and spearfishers.

The combination of the internal open-cell neoprene provides good stretch and fit, ensuring significant freedom of movement during dives and hunting phases. The external camouflage lining helps improve concealment in the water, reducing visibility and allowing for a more discreet approach to prey.

This wetsuit is engineered to provide thermal comfort and mechanical resistance, essential features for freediving and spearfishing sessions in different environmental conditions. The lightweight material makes buoyancy trim and weight management easier underwater without making finning feel heavy.

Wolverine C4 Silicone Fins for Freediving Training

The Wolverine fins by C4 are designed specifically to improve finning technique during freediving and spearfishing training. Made entirely from soft, durable silicone, these short fins offer a high level of elasticity and comfort, essential for refining thrust transmission in both flutter kick and the dolphin kick movement typical of monofins.

Technical Features

• Material: Soft silicone, ensuring durability and optimal elastic response
• Blade Stiffness: Soft, with structured ribs for efficient water-flow direction and calibrated elastic return
• Foot pocket design: Preformed and shaped for right and left foot, for a comfortable and secure fit
• Available Sizes: 36/37, 38/39, 40/41, 42/43, 44/45

Applications and Benefits

The Wolverine fins are ideal for dynamic freediving training sessions, helping improve movement coordination and optimize finning efficiency thanks to the balance between mechanical resistance and blade lightness. The silicone construction helps maintain excellent hydrodynamic fluidity while reducing fatigue during repeated exercises.

UP C4 Fins in collaboration with Umberto Pelizzari

The UP C4 fins are designed specifically for freediving and spearfishing, combining strength and ergonomic comfort with high-quality Italian design. Made with selected materials, these fins feature high-visibility luminescent colors in the water, essential for recognition during dives.

Technical features and materials

The blades are made of plastic with finishes that recall carbon fiber weaves, delivering a technical and functional aesthetic. The blade surface is divided into a smooth, glossy central section and two side sections with a carbon fiber pattern, while the rear features contrasting finishes to optimize thrust transmission.

The blade’s variable geometry is designed to:

• protect the area near the foot
• prevent load loss along the entire length

The water rails in thermorubber are overmolded at high pressure and temperature, improving water channeling and grip during the fin stroke.

Foot pocket ergonomics and efficiency

The fins are fitted with the 250 foot pocket, pre-shaped with a 3° angle and made from a soft, adaptable plastic material to ensure comfort and a perfect fit. The rigid insole effectively transfers energy from the foot to the blade, increasing thrust efficiency during the dive.

The overall fin-foot pocket angle is 32°, optimal for a fluid and responsive fin stroke in freediving and spearfishing.

Technical specifications

• Blade dimensions: 795 x 625 mm
• Complete fin dimensions: 910 x 625 mm
• Blade Stiffness: Soft – value 25
• Available in 7 sizes: 36/37, 38/39, 40/41, 41/42, 42/43, 43/44, 44/45
• 100% Italian origin

Applications and benefits

These fins deliver precise, responsive thrust transmission thanks to the combination of soft yet durable materials and the advanced blade geometry. Their light weight and hydrodynamic efficiency improve comfort and fluidity of the fin stroke, essential for freediving and spearfishing.

UP C4 Fins for Freediving and Spearfishing

The UP C4 fins, developed in collaboration with Umberto Pelizzari, offer a distinctive design with bright, luminescent colors that are easy to see in the water. Made entirely in Italy with selected materials, they deliver a combination of mechanical strength and light weight, ideal for freediving and spearfishing.

Technical features of the blades

• Plastic Blades with finishes inspired by the weave of carbon fiber, featuring a smooth, glossy central band flanked by side areas with a technical pattern, and different finishes on the rear side of the blade.
• Variable geometry designed to protect the junction area with the foot pocket and reduce load losses along the entire length of the blade.
• 29° blade angle, combined with a 3° angle of the 250 foot pocket, for a total angle of 32° that optimizes thrust transmission and kick fluidity.
• High-pressure and high-temperature overmolded thermorubber water rails improve hydrodynamic control and lateral stability of the blade.
• Blade dimensions: 795 x 625 mm.
• Stiffness: Soft 25, for a good balance between responsiveness and flexibility, ideal for efficient propulsion while maintaining comfort during extended use.

Foot pocket details and comfort

The 250 foot pockets, pre-shaped with a 3° angle, are made from soft, adaptable plastic materials to ensure a snug and comfortable fit. The rigid insole provides direct energy transfer from the leg to the blade, maximizing propulsion efficiency during underwater finning.

Additional information

• Overall fin dimensions: 910 x 625 mm.
• 100% Italian origin and production.
• Available in 7 sizes: 36/37, 38/39, 40/41, 41/42, 42/43, 43/44, 44/45.

The UP C4 fins are specifically designed for freediving and spearfishing, enhancing comfort, propulsion efficiency, and mechanical strength—essential features for freshwater or saltwater dives.

UP C4 Fins for Freediving and Spearfishing

The UP C4 fins, designed in collaboration with Umberto Pelizzari, are a high-quality Italian product specifically developed for the needs of freediving and spearfishing. Made with selected materials, they provide an optimal balance of mechanical strength, elasticity, and efficiency in power transfer.

Technical Features and Design

• Plastic blades with finishes inspired by the carbon fiber weave, made up of a smooth, glossy central section and two side sections with a carbon fiber-like texture.
• Variable geometry designed to protect the blade in the area close to the foot and reduce load losses along its entire length, improving the fluidity of the fin stroke.
• Water rails in high-pressure and high-temperature overmolded thermorubber, with variable geometry, to increase the blade’s tracking and stability during movement.
• 29° blade angle, combined with the 3° angle of the 250 foot pocket, for a total of 32°, optimizing trim and power transfer in the water.
• 250 Foot Pockets pre-shaped at 3°, made from soft plastic material, with a rigid insole that transfers all the energy generated by the foot to the blade, ensuring high efficiency during the fin stroke.

Comfort and Fit

The 250 foot pockets are designed to adapt perfectly to different foot shapes, thanks to the elasticity and softness of the material used, ensuring a comfortable fit even during extended sessions in the water.

Available Variants

• Stiffnesses: 25 (soft) and 30 (medium), to adjust blade responsiveness according to individual preference.
• Available Sizes: 36/37, 38/39, 40/41, 41/42, 42/43, 43/44, 44/45.

Dimensions

• Blades: 795 x 625 mm
• Overall fin size: 910 x 625 mm

The combination of quality materials, a specific design for freediving and spearfishing, and collaboration with a leading athlete like Umberto Pelizzari results in a technical product suited to those seeking precision, fluidity, and comfort in the water.

Camoskin Ocean Wetsuit for Spearfishing

Camoskin Ocean is a two-piece wetsuit designed specifically for spearfishing and freediving, made by C4 with high-quality materials and technical features engineered to ensure comfort, stretch, and durability in the water.

Materials and Construction

The wetsuit is made from open-cell macrocellular neoprene on the inside, with an elastic outer lining in a gray/blue camouflage colorway, ideal for blending into oceanic and Mediterranean environments. The neoprene used is a 100% CR (Chloroprene) limestone-based rubber, containing 99% calcium carbonate. This material provides:

• High softness and excellent elastic recovery
• Excellent two-way stretch thanks to the 95% polyester and 5% spandex lining
• TÜV certification for the absence of harmful substances such as phthalates and latex, making it an eco-friendly choice
• Hardness range (Type C) between 0-2 and 600% elongation at break, ensuring mechanical strength and flexibility

Design and Fit

Camoskin Ocean features a pre-shaped anatomical cut with a reduced number of panels and seams, elements that improve fit and stretch, especially in critical areas such as the shoulders, knees, and elbows, ensuring greater freedom of movement and comfort during finning and underwater maneuvers.

The jacket is equipped with a beavertail closure reinforced with glued Melco Tape and Lycra edging, technical details designed to prevent tearing and frequent wear during donning and doffing.

Reinforcements and Protection

• Abrasion-resistant Reinforcements on the knees for protection during dives in rocky environments or where frequent contact occurs
• Padded Chest Pad for chest protection
• Elbow protection with polyurethane finishing to increase durability and resistance without compromising stretch

Versions and Sizes

The wetsuit is available both as a complete set and separately as a jacket or pants to suit the specific needs of the freediver or spearfisher.

• Available thicknesses: 3.0 mm and 5.0 mm
• Available Sizes: 1, 2, 3, 4 and 5

Camouflage Features

The camouflage colorway is digitally hand-created, ensuring unique, one-of-a-kind patterns that enhance the ability to blend into the underwater environment, an essential factor for spearfishing.

Camoskin Med - C4 Spearfishing Wetsuit

Camoskin Med is a two-piece wetsuit designed for spearfishing and freediving, made with open-cell macrocellular neoprene on the inside and a stretchy outer lining with a gray/brown camouflage pattern.

Materials and Construction

The wetsuit is made from 100% CR (Chloroprene) limestone-based neoprene rubber with 99% calcium carbonate, one of the softest materials on the market thanks to its high elastic recovery. This neoprene is eco-friendly and TÜV certified for the absence of harmful substances such as phthalates and latex.

The inner lining is made of 95% polyester and 5% spandex, ensuring two-way stretch and excellent resistance to external elements, ideal for maintaining durability in the marine environment.

Design and Comfort

Camoskin Med features a pre-shaped anatomical cut and a reduced number of panels and seams. The panels are hand-glued and the seams are non-through. This configuration improves fit, mobility, and stretch, especially in critical areas such as the shoulders, knees, and elbows, allowing smooth, efficient movement.

The jacket features a toggle closure, reinforced with glued Melco Tape and Lycra binding to reduce the risk of tearing when putting it on and taking it off.

Protections and Reinforcements

• Abrasion-resistant Reinforcements on knees and elbows with polyurethane finish
• Padded Chest Pad for additional protection when loading the speargun

Variants and Sizes

The wetsuit is available as a complete set or separately as a jacket or pants, to suit different spearfishing needs.

• Available thicknesses: 3.0 mm, 5.0 mm, 7.0 mm
• Available Sizes: 1, 2, 3, 4, and 5

Additional Technical Features

• Type C hardness range: 0-2
• Elongation at break: 600%
• Digital camouflage colorway for effective camouflage 

C4 Carbon line release system

The C4 Carbon line release system is designed for carbon spearguns in the C4 range and controls the release of the line connected to the shaft during the shot. The component is engineered to ensure smooth movement, mechanical reliability, and resistance to marine corrosion during spearfishing use.

Construction and materials

The system is made from AISI 316 stainless steel, a material used to provide high resistance to:

• saltwater corrosion
• abrasion
• mechanical wear

Construction with CNC components ensures mechanical precision and consistent performance over time, even with intensive use in salt water.

Compatibility and operation

This model is compatible with C4 Auto-R trigger mechanisms and can be configured on either the right or left side according to the speargun setup.

The system holds the line during loading and automatically releases it at the moment of the shot, helping to:

• reduce friction
• improve reloading speed
• provide greater safety during loading
• prevent line snagging
• prevent premature releases
• limit line twisting

Use in spearfishing

The C4 line release system is suitable for single- or double-band spearguns and maintains a smooth, precise release even under high band load.

C4 Auto-R mechanisms are designed to provide long service life, resistance to oxidation, and consistent trigger sensitivity over time.

Made in Italy.

Extreme Bag 120L by C4: Waterproof Gear Bag for Underwater Gear

Extreme Bag 120L by C4 is a spacious waterproof gear bag designed for carrying freediving, spearfishing, and freediving gear. Its rugged construction ensures optimal protection and practicality during transport.

Materials and Durability

Made from heat-welded Tarpaulin, a waterproof and tear-resistant material, this gear bag provides reliability and long-lasting performance, even in wet and salty environments typical of underwater activities.

Closure Features and Practicality

• Double safety closure: dual-slider zipper combined with elastic hooks, ensuring a watertight seal and easy use.
• External document pocket for quick and secure access to cards and permits.
• Zippered side pocket containing a dedicated changing mat, useful for keeping gear clean and protected during preparation.
• Integrated drain valve for quickly draining excess water, making it easier to rinse and dry gear directly inside the gear bag.

Portability

Extreme Bag features two side handles and an adjustable central handle, designed to provide comfortable, balanced carrying even with bulky, oversized loads typical of freediving and spearfishing gear.

Available Versions

The model is available in two capacities: 90 liters and 120 liters, allowing you to choose the size best suited to your underwater gear transport needs.

Extreme Bag 90L by C4 - Waterproof Gear Bag for Freediving and Spearfishing Equipment

Extreme Bag 90L by C4 is a spacious and durable Gear Bag, specifically designed for transporting freediving, spearfishing, and underwater activity equipment.

Materials and Durability

Made from heat-welded Tarpaulin, a waterproof and tear-resistant material, it ensures optimal protection for your gear even in wet environments or when exposed to salt water.

Design and Functionality

• Spacious Gear Bag with a 90-liter capacity, ideal for carrying wetsuits, fins, masks, and other underwater accessories.
• Dual safety closure: a double-slider zipper combined with elastic hooks to ensure an efficient seal.
• External document pocket for securely storing cards and certificates.
• Side zippered pocket containing a changing mat, improving convenience during gear-up.
• Drain valve for quick and easy drainage of excess water, making it easier to rinse your equipment directly inside the bag.

Portability and Comfort

The bag features two side handles and an adjustable central handle that improves carrying comfort, allowing easy transport even when fully loaded.

Available Versions

Extreme Bag is available in 90-liter and 120-liter versions, adapting to different capacity needs for freediving, spearfishing, and other underwater disciplines enthusiasts.

Weight Segment Kit for C4 Dyno and D&D Neck Weights

The Segment Kit consists of 4 additional weights for customizing the load on C4 neck weights, specifically designed for the Dyno and D&D models. The total kit weight is 1.4 kg, allowing buoyancy to be easily adjusted according to the needs of spearfishing and freediving.

Technical Features

• 500 g, 380 g, 280 g, and 210 g segments, for a total of 1.4 kg
• Fastening materials: pins and screws in stainless steel, ensuring corrosion resistance in marine environments
• Compatibility: suitable for Dyno and D&D C4 neck weights
• Color: White, for a discreet integration with freediving and spearfishing gear

Functions and Benefits

This 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.

The 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.

Weight Segment Kit for C4 Dyno and D&D Neck Weights

This 1.4 kg segment kit is designed to allow weight customization for C4 neck weights used in freediving and spearfishing, ensuring precise, adjustable buoyancy trim according to different underwater needs.

Kit Contents

• 4 separate weight segments: 500 g, 380 g, 280 g, and 210 g
• Compatible with Dyno and D&D C4 models
• Complete with stainless steel rods and screws for secure, corrosion-resistant fastening
• Black color for a discreet profile that integrates cleanly with your gear

Technical Features and Benefits

By 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.

The screw-and-rod assembly provides stable, reliable fastening, preventing unwanted movement during freediving or spearfishing sessions.