S-990 Firestone Fins in 100% Carbon - 200 Line C4

The S-990 Firestone are an advanced solution for freediving and spearfishing, made from 100% carbon and part of C4’s 200 line, designed to deliver an optimal combination of lightness, responsiveness, and mechanical strength.

Structure and Materials

The blade features a progressive lamination of 4 different types of Japanese carbon, arranged in 7 unidirectional layers. This technical construction allows for excellent optimization of thrust transmission and blade durability.

The blade tip is shaped with a swallowtail profile, a design that improves finning fluidity and hydrodynamics, reducing water resistance during freediving movement.

Water Rails and Protection

The water rails are integrated through bonding and high-pressure, high-temperature overmolding, a process that fuses the polymer with the blade’s carbon composite, eliminating the risk of detachment during dives.

The variable geometry of the water rails has been engineered to:

• Protect the blade in the area adjacent to the foot
• Minimize load losses along the entire length of the blade

Foot Pocket and Sizes

The fins are fitted with the 200 foot pocket, made with a black thermoplastic elastomer upper and a red polypropylene sole, designed to ensure comfort, fit, and durability in the water.

The blade dimensions are 770 x 192 mm, optimized to ensure efficiency and control during finning.

Stiffnesses and Available Sizes

The S-990 Firestone fins are available in three stiffness levels to suit different thrust and control needs in freediving:

• 25 Soft
• 30 Medium
• 40 Hard

The sizes cover a wide range:

• 36/37
• 38/39
• 40/41
• 41/42
• 42/43
• 43/44
• 44/45

SPORTECH CARBON carbon freediving Fins

The SPORTECH CARBON are fins designed specifically for dynamic freediving and deep freediving, optimally balancing performance and ergonomic comfort. These fins deliver reliable efficiency during extended sessions, ensuring effective thrust transmission and a smooth kick while freediving.

Main technical features

• Open-heel silicone Foot Pocket: anatomical and soft, it provides an excellent fit for lasting comfort and greater freedom of movement.
• Right and left anatomical design: optimizes foot fit and improves kicking fluidity.
• Monobloc carbon structure: seamless, it allows continuous and efficient power transfer, increasing blade responsiveness.

Use and performance

Compared to the PROTech model, which is more geared toward competitive use, the SPORTECH CARBON are ideal for freedivers who need a versatile product, combining a high technical level with superior comfort. Their composition and construction make them suitable for frequent use, maintaining an excellent balance between lightness and mechanical strength while freediving.

SPORTECH FBG Fins for Freediving

The SPORTECH FBG fins are designed in fiberglass for modern pure freediving, offering an optimal balance of efficiency, comfort, and control during long training sessions in dynamic apnea and constant weight.

Technical Features

• Blade dimensions: 750x194 mm
• Full fin dimensions (size 40/42): 860x194 mm
• Blade material: Fiberglass Prepreg Epoxy
• Blade Stiffness: Soft, Medium/Soft
• Blade color: Black
• Water Rails: Black with rounded anti-turbulence profile
• Foot Pockets: SPORTECH silicone
• Available Sizes (Europe): 35/37 – 37/39 – 39/41 – 41/43 – 43/45 – 45/47
• Available Sizes (US/Canada): 4.5–6.5 – 6.5–7.5 – 7.5–8.5 – 8.5–9.5 – 9.5–11 – 11–12.5
• Compatibility: Only with SPORTECH blade models

Design and Comfort

The silicone foot pocket is designed to provide a soft, progressive fit, reducing fatigue and preventing pressure points. The open heel and right/left differentiated anatomical design ensure a better fit to the foot.

The one-piece structure with no gaps, derived from the PROTech model, allows direct and efficient power transfer, improving finning responsiveness and fluidity of movement in the water.

Applications

The SPORTECH FBG are recommended for freedivers engaged in regular dynamic apnea and constant weight training. These are freediving-specific fins, designed for frequent, uncompromising use with a competitive price-to-performance ratio.

SPORTECH FBG Fins for Freediving

The SPORTECH FBG are freediving fins made from Prepreg Epoxy fiberglass, designed for modern pure freediving. The design focuses on efficiency, comfort, and control during extended sessions, both in dynamic freediving and constant weight.

Technical Features

• Blade dimensions: 750 x 194 mm
• Complete fin dimensions (size 40/42): 860 x 194 mm
• Blade Stiffness: Soft, Medium/Soft, designed for progressive, controlled thrust transmission
• Water rails: black anti-turbulence rounded profile, to improve hydrodynamics and stabilize the fin in motion
• Foot Pocket: soft SPORTECH silicone with open heel, ensuring a comfortable, progressive fit while reducing fatigue and pressure points
• Differentiated anatomical design between right and left, for an ergonomic fit and improved power transfer
• Monoblock structure with no voids, derived from the PROTech model, to maximize thrust efficiency
• Available Sizes (Europe): 35/37 – 37/39 – 39/41 – 41/43 – 43/45 – 45/47
• Available Sizes (US/Canada): 4.5–6.5 – 6.5–7.5 – 7.5–8.5 – 8.5–9.5 – 9.5–11 – 11–12.5
• Compatibility: only with SPORTECH blade models

Materials and Performance

The blade is made from fiberglass Prepreg Epoxy, a material that provides an optimal combination of light weight, mechanical strength, and reactivity. The Soft and Medium/Soft blade stiffness allows for a smooth finning action and better movement control in the water, ideal for dynamic freediving and constant weight.

Comfort and Ergonomics

The silicone foot pocket is designed to ensure a soft, progressive fit, minimizing fatigue during extended dives. The open heel promotes foot stability without limiting freedom of movement, while the differentiated anatomical design optimizes power transfer, improving overall fin control.

Applications

The SPORTECH FBG are recommended for freedivers who train regularly in dynamic or constant weight. They are designed for frequent, dedicated freediving use, delivering an excellent balance of technical quality and cost/performance ratio in the spearfishing and freediving sector.

Storm C4 plastic fins for freediving and spearfishing

The Storm fins, entirely made in Italy by C4, are specifically designed for the needs of freedivers and spearfishers. The quality of the materials and purpose-driven design ensure mechanical strength and long-term durability, suitable for dives in shallow water down to 18 meters.

Technical features:

• Technopolymer Blade overmolded with a compound engineered to ensure softness, high elastic return, and durability
• Reduced dimensions: 780 x 195 mm, approximately 10 cm shorter than standard spearfishing fins, optimized for maneuverability and fluidity in shallow water
• Water rails positioned at the tip of the blade to improve hold and reduce sideslip during the kick cycle, thereby increasing thrust efficiency
• Pre-shaped 3° “250” Foot Pocket with rigid sole, designed to transfer all energy to the blade, ensuring optimal thrust transmission
• Low weight of 590 grams for size 42/43, promoting lightness and reducing fatigue during the dive

Stiffness and availability

• Blade Stiffness: 25 soft, balanced for a compromise between flexibility and energetic response
• Available in eight sizes to ensure a precise and comfortable fit: 36/37 – 38/39 – 40/41 – 41/42 – 42/43 – 43/44 – 44/45 – 46/47

The Storm fins are suitable for freedivers of all levels, especially those operating in shallow underwater environments. The combination of innovative materials and compact design ensures comfort, hydrodynamic efficiency, and excellent kick performance.

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.

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

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.

C4 Belt Fish Stringer by Marco Bardi

The C4 belt fish stringer was designed specifically for spearfishing and freediving, ensuring practicality and functionality during the dive. Made with durable materials and a design engineered for efficiency, it allows fish to be carried securely without compromising the freediver’s comfort.

Technical features

• Easy attachment: it attaches quickly to the belt even with weights already being worn, avoiding interruptions during spearfishing sessions.
• Pin with V-shaped head: makes it easier to thread the fish onto the line, reducing friction and the risk of damaging the catch.
• Plain Edge plastic line: does not damage the fish’s skin and does not absorb odors, preserving the quality of the catch during spearfishing.
• Mini cleat for line adjustment: allows the line to be wrapped to reduce bulk and optimize management of the fish stringer in the water.
• Ambidextrous use: can be attached on either the right or left side, ensuring maximum versatility according to the freediver’s habits.
• Integrated D-rings: two elements allow snap clips to be secured, increasing safety and attachment convenience during underwater activity.

Benefits for spearfishing

This fish stringer stands out for its light weight and ease of use, ensuring efficient carrying without compromising underwater mobility. The reduced bulk and quick adjustment option allow the freediver to stay focused on spearfishing technique, improving comfort and load management during the dive.

Absolute Cleaner: Specific Degreaser for Freediving and Spearfishing Masks

The result of a collaboration between C4 and Real Chimica, the well-known manufacturer of Chanteclair, Absolute Cleaner is an innovative, patented product for cleaning freediving masks. Ideal for permanently removing silicone oils from the glass lenses of new or used masks, it helps eliminate one of the main causes of fogging during dives.

Technical Features and Benefits

• Specific, patented formula for freediving and spearfishing masks that effectively removes silicone oils without damaging plastic parts or the skirt
• Solves the problem of the oily film that forms on the lenses after the silicone molding process at high temperatures
• Extensively tested and certified to ensure deep, safe cleaning of glass surfaces
• Compatible with new or used masks that have fogging issues caused by silicone residue

Instructions for Use

1. Spray the undiluted product on both surfaces of the lenses and on the skirt area before wetting them
2. Scrub the inner and outer lens surfaces vigorously for 4-5 minutes with a toothbrush or a sturdy cloth
3. Let the product work for at least 10 minutes, then rinse the mask thoroughly
4. Repeat the entire procedure (steps 1, 2, and 3) for optimal results

Note: It is not necessary to repeat the cleaning immediately before using the mask.

Applications and Benefits

Absolute Cleaner is a definitive solution for maintaining freediving and spearfishing masks, improving clarity and reducing the risk of fogging caused by silicone residue. It ensures a clear, consistent field of vision, optimizing diving conditions and underwater safety.

Marco Bardi Lower Back Protection in High-Strength Nylon

The Marco Bardi lower back protection is a device designed to protect the lumbar area during freediving and spearfishing. Made from high-strength Nylon, this shaped rigid plate inserts easily into the weight belt, distributing the load over a wider area and reducing the risk of lower back inflammation.

Technical and Functional Features

• Material: high-strength Nylon for durability and toughness
• Shaped design: fits the natural curve of the lower back perfectly to help limit and correct excessive arching of the back
• Quick slots: allow easy insertion into the belt without removing the weights
• Non-slip: internal bends prevent the protection from shifting during the dive

Benefits During Use in the Water

The protection helps maintain a more horizontal position in the water, improving hydrodynamics and promoting optimal trim during spearfishing or freediving sessions. Load distribution reduces strain on the back, helping limit inflammation and lower back pain caused by the concentrated weight of the ballast on the belt.

Application

1. Insert the rigid plate into the slots of the weight belt
2. Position it over the lower back area
3. Check that the protection is stable and secured by the non-slip bends

C4 Elastic Line for Freediving Float

The C4 elastic line is designed to keep the float steadily positioned directly above the diver during freediving or spearfishing sessions, reducing the risk of losing it. Thanks to its ability to stretch up to three times its relaxed length, it effectively absorbs tension caused by waves and wind, ensuring safer, more controlled float management.

Technical Features

• Stretch: up to 3 times its relaxed length with no effort
• Materials: durable and flexible elastic cord, high-durability nylon swivel snap hooks at the ends
• Available lengths: 4 meters, 8 meters, 12 meters

Functional Benefits

The elasticity of the cord helps counteract the dynamic forces of water and wind, keeping the float in an optimal position relative to the diver, thereby improving safety and gear management during freediving and spearfishing.

The nylon swivel snap hooks ensure a reliable, twist-free connection, making it easier to attach and adjust the line to the float and underwater anchor.

200 C4 Carbon Foot Pockets for Freediving and Spearfishing

The 200 Foot Pockets by C4 Carbon are an innovative solution designed specifically for freediving and spearfishing. Featuring a lightweight, hydrodynamic design, these foot pockets significantly reduce effort during finning, improving efficiency.

Materials and Construction

Made with a soft, self-molding thermoplastic elastomer upper, they adapt perfectly to the foot, ensuring comfort and a customized fit. The footbed is made of rigid plastic and is engineered to transfer energy to the blade optimally, ensuring effective thrust during finning.

Technical Features and Innovations

• Glue-free mounting to the blade for greater flexibility and increased ankle rotation.
• Neutral fit designed to eliminate drag caused by unbalanced posture, improving the fluidity of underwater movement.
• Six integrated threaded inserts to adjust the blade position in 3 different settings, offering customized options based on the needs of the freediver or spearfisher.
• 3D overmolded water rails with O.P.S. shaping for additional protection and improved ergonomics.

Sizes and Compatibility

Available in sizes 36/37, 38/39, 40/41, 41/42, 42/43, 43/44, and 44/45, following the specifications of C4’s 200 line.

Note: Due to the reduced dimensions of the attachment, the 200 foot pockets are compatible exclusively with C4 200 line blades.

Colors

• Upper: Black
• Footbed: Green

Benefits for Freediving and Spearfishing

These foot pockets offer optimized biomechanics that help reduce fatigue during finning thanks to a neutral fit and improved energy transfer. The ability to adjust the blade position makes it easier to adapt to different swimming styles and spearfishing conditions, improving precision and comfort during the dive.

200 C4 Carbon Foot Pockets for Freediving and Spearfishing

The 200 Foot Pockets are an innovative, technical solution developed by C4 Carbon for freediving and spearfishing. Designed to integrate exclusively with the blades in the 200 line, these foot pockets stand out for their light weight, hydrodynamics, and improved functionality compared to traditional models.

Technical Features and Materials

The construction is divided into two complementary components:

• Soft, self-molding upper: made of thermoplastic elastomer, it provides an ergonomic, comfortable fit to the shape of the foot, ensuring elasticity and thermal comfort.
• Rigid plastic footbed: designed to transfer energy effectively to the blade during the fin stroke, improving thrust transmission and responsiveness.

Biomechanics and Trim

A distinctive feature of the 200 Foot Pockets is the neutral fit, developed to maintain the diver’s correct trim by eliminating drag caused by unbalanced posture. This allows for a smoother fin stroke and a wider ankle rotation, reducing muscle fatigue during the dive.

Adjustments and Compatibility

The foot pockets are equipped with six threaded inserts that allow the blade position to be adjusted to three different heights, providing effective customization to suit the specific biomechanical needs of the spearfisher.

Important note: due to the reduced size of the attachment points, these foot pockets are compatible exclusively with C4 200 line blades.

Additional Details

• Water rails: 3D overmolded with O.P.S shaping for increased protection and improved hydrodynamics.
• Available Sizes: 36/37, 38/39, 40/41, 41/42, 42/43, 43/44, 44/45.
• Colors: black upper, red footbed.
• Three times lighter than traditional foot pockets, reducing effort during the fin stroke.

C4 Carbon 200 Foot Pockets for Freediving and Spearfishing

The 200 Foot Pockets by C4 Carbon are an innovative, technical solution designed for freedivers and spearfishers looking for light weight, hydrodynamics, and maximum efficiency in thrust transfer during finning.

Design and Materials

These foot pockets are made of two separate parts:

• A soft, self-molding upper in thermoplastic elastomer that adapts perfectly to the shape of the foot, ensuring comfort and elasticity.
• A rigid plastic insole designed to optimally transfer energy to the blade, improving responsiveness during finning.

The construction without bonding to the blade promotes greater flexibility and a wider ankle rotation, improving movement efficiency in the water.

Technical Features and Functionality

• Neutral fit: designed to ensure balanced diver trim, reducing drag caused by unbalanced posture.
• Custom blade position adjustment: thanks to six threaded inserts and three different positions, the blade trim can be adapted to the user’s specific needs.
• 3D overmolded water rails with O.P.S. shaping for effective protection and improved hydrodynamics.

Technical Specifications

• Exclusive compatibility with blades from the C4 200 line, due to the exclusive compact attachment.
• Available in 7 sizes: 36/37, 38/39, 40/41, 41/42, 42/43, 43/44, 44/45.
• Color: black upper, white insole.
• Three times lighter than traditional foot pockets, optimized to reduce effort during finning.

Benefits for Freediving and Spearfishing

The combination of high-performance materials and the modular structure of the 200 Foot Pockets enables more efficient energy transfer, smoother movement, and superior comfort thanks to the self-molding fit.

The ability to customize the blade trim ensures precision and adaptability based on freediving conditions and spearfishing style.

Foot Pocket 250 C4 for Freediving and Spearfishing

The 250 Foot Pocket by C4 represents the evolution of the 200 and 300 lines, designed to provide superior lightness and elasticity while optimizing comfort and thrust transmission during finning.

Technical Features

• Rigid insole in integrated co-molded polypropylene, for improved biomechanical support and greater efficiency in power transmission.
• Soft thermorubber upper, elastic, ensuring a comfortable fit even without fin socks, increasing freedom of movement and comfort under load.
• Rails reduced to a minimum, simplifying blade attachment and reducing the overall weight of the foot pocket for a more balanced trim in the water.
• Single-screw fastening system that speeds up assembly and disassembly, improving ease of use while freediving.
• Low weight of just 246 grams, a feature that contributes to greater agility during finning and reduced muscle fatigue.

Sizes and Color

• Available in 9 sizes: 36/37, 38/39, 39/40, 40/41, 41/42, 42/43, 43/44, 44/45, 46/47.
• Black color.

Benefits for Freediving and Spearfishing

The 250 C4 foot pocket combines lightness, elasticity, and a rigid insole to deliver an excellent balance of comfort and responsiveness. The reduced rails ensure better blade efficiency, allowing a smoother, less tiring kick, essential for freediving and spearfishing.

C4 250 Foot Pocket for Freediving and Spearfishing

The 250 foot pockets are a major evolution of the 200 and 300 series by C4, designed specifically for freedivers and spearfishers who demand lightness, elasticity, and optimal comfort during the dive.

Technical Features

• Soft thermorubber upper with elastic properties, designed to ensure a comfortable fit even without socks.
• Rigid polypropylene insole co-molded internally, providing stiffness and stability in power transfer during the fin stroke.
• Minimized side rails, reducing weight and making it easier to attach the foot pocket to the blade, optimizing the system’s hydrodynamic efficiency.
• Single-screw fastening system that speeds up assembly and disassembly, ensuring quick, practical gear preparation.
• Total weight of only 246 grams, helping reduce fatigue in the water and improving finning fluidity.

Benefits

The combination of light weight, soft materials, and a rigid insole allows the 250 foot pockets to deliver an ideal balance between comfort and effective power transfer to the blades. The third-degree preformed anatomical structure securely wraps the foot, improving stability during underwater activity.

Specifications and Availability

• Available in 9 sizes: 36/37, 38/39, 39/40, 40/41, 41/42, 42/43, 43/44, 44/45, 46/47
• Color: White

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 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.

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.

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.

Mimetic Back Weight with Fringes C4 by Marco Bardi

The C4 mimetic back weight with fringes, designed by Marco Bardi, is an adjustable Weight system ideal for spearfishing and freediving. Its load capacity ranges from 2 to 6 kg, allowing precise weight adjustment based on individual needs.

Made with elastic and adjustable materials, it ensures a comfortable and secure fit, promoting freedom of movement during dives. The mimetic design with fringes helps reduce visibility in the water, improving camouflage.

Main technical features

• Adjustable Weight from 2 to 6 kg
• Elastic material for excellent body adaptability
• Simple, practical adjustment for proper trim
• Mimetic design with fringes for improved underwater camouflage
• Comfortable donning and secure fastening during freediving sessions

C4 Modular Back Weight by Marco Bardi

The C4 Modular Back Weight, developed in collaboration with Marco Bardi, is a weight system specifically designed for freediving and spearfishing. Engineered to ensure efficient weight distribution, it offers a modular capacity from 2 to 12 kg, allowing you to adapt your ballast setup to individual needs during dives.

The weight can be positioned over a large surface area of the Back Weight, ensuring optimal balance and improving comfort in the water. Ease of use is ensured by quick drying and the ability to adjust the configuration even during spearfishing sessions, making real-time customization easier.

The lightweight, durable material is designed to ensure long-lasting performance and practicality without compromising freedom of movement or finning efficiency.

Main features:

• Modular weight capacity from 2 to 12 kg
• Weight distribution over a large surface area for improved balance
• Easy adjustment even during underwater activity
• Quick-drying material
• Ergonomic design for comfort and practicality
• Color: Black
• Weight not included, to be purchased separately

1 kg Segment for C4 Neck Weights – Freediving Equipment

The 1 kg segment is designed for both C4 neck weights, Dyno and D&D, a technical device dedicated to freedivers. This segment allows the neck weight to be customized modularly, ensuring precise adjustment to the freediver’s needs.

Technical Features

• Weight: 1 kilogram
• Material: durable and suitable for underwater use
• Color: Gray
• Attachment system: screw with pin included for safe, easy installation
• Modularity: multiple segments can be combined and assembled to adjust the overall weight

Functionality and Benefits

The screw attachment system ensures that the segments are semi-mobile, allowing them to follow the natural movements of the spine without restricting freedom of movement. This feature improves comfort during the dive, maintaining balanced and stable trim in the water.

The system’s modularity allows the freediver to precisely customize weight distribution according to diving style and specific conditions, optimizing underwater efficiency and maneuverability.

1 KG Segment for C4 Dyno Freediving Neck Weight

The 1 kg segment is designed specifically for the C4 Dyno neck weight, an essential component for freedivers who need customization and comfort when balancing weight during freediving activities.

The 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.

A 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.

Main Features

• Material: made to ensure mechanical strength and long-lasting durability
• Fastening system: screw and axle included for secure, stable assembly
• Color: white, with a version also available in black
• Compatibility: exclusively for the C4 Dyno neck weight designed for freediving
• Semi-mobile design to follow the movements of the spine without restriction

This 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.

1 Kg Segment for C4 Dyno Neck Weight – Freediving Gear

The 1 Kg segment is specifically designed for use with the C4 Dyno neck weight, an essential component in freediving and spearfishing gear. This segment lets you customize the neck weight in a modular way, ensuring precise adjustment to the freediver’s needs.

Technical features

• Weight: 1 kilogram
• Material: durable and suitable for underwater use
• Color: Black
• Attachment system: screw with axle included for secure, easy assembly
• Modularity: multiple segments can be combined and assembled to adjust the overall weight

Functionality and benefits

The screw attachment system ensures the segments are semi-mobile, allowing them to follow the natural movements of the spine without restricting freedom of movement. This feature improves comfort during the dive, maintaining balanced, stable trim in the water.

The system’s modularity allows the freediver to precisely customize weight distribution based on diving style and specific conditions, optimizing efficiency and underwater maneuverability.

1 Kg Segment for Dyno C4 Neck Weight

Single 1 kg segment specifically designed for the Dyno C4 neck weight, developed for use in freediving and spearfishing. This component allows the neck weight to be customized modularly, thanks to the screw fastening system.

Technical Features

• Material and construction: built to ensure strength and durability during the dive.
• Screw fastening system: allows the segments to be assembled and combined precisely, adapting them to the individual needs of the freediver.
• Semi-mobile movement: the secured segments follow the natural movements of the spine without limiting flexibility, improving comfort and freedom of movement in the water.
• Color: red for easy identification and weight management.

Included in the Package

• 1 kg segment
• Fixing pin
• Screw for securely locking the segment onto the Dyno C4 neck weight

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.

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

500-Gram Segment for C4 Freediving Neck Weights

This 500-gram segment is designed for both C4 neck weights, Dyno and D&D, 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 activities.

Technical Features

• Screw fastening: The system allows multiple segments to be combined, enabling a configuration adaptable to the individual needs of the freediver.
• Semi-mobile movement: After fastening, the segments maintain a certain degree of mobility, following the natural alignment of the vertebrae and ensuring no restrictions on spinal movement.
• Material and weight: The segment weighs 500 grams, offering a good balance between durability and lightness, ideal for avoiding added strain on posture during dives.
• Color: Gray, for a clean look and good integration with spearfishing equipment.
• Complete package: The product is supplied with an axle and screw for immediate fastening on C4 neck weights.

Functionality and Benefits

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

380-Gram Segment for C4 Freediving Neck Weights

This 380-gram segment is designed for both C4 neck weights, Dyno and D&D, 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.

Technical Features

• Screw fastening: The system allows multiple segments to be combined, enabling a configuration that can be adapted to the individual needs of the freediver.
• Semi-mobile movement: Once fastened, the segments retain a degree of mobility, following the natural alignment of the vertebrae and ensuring no limitations to spinal movement.
• Material and weight: The segment weighs 380 grams, offering a good balance between strength and lightness, ideal for not weighing down posture during the dive.
• Color: Gray, for a clean look and good integration with spearfishing equipment.
• Complete package: The product is supplied with axle and screw for immediate attachment to C4 neck weights.

Functionality and Benefits

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

280-Gram Segment for C4 Dyno Freediving Collar

This 280-gram segment is designed for both C4 collars, Dyno and D&D, 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 activity.

Technical Features

• Screw fastening: The system allows multiple segments to be combined, enabling a configuration that can be adapted to the individual needs of the freediver.
• Semi-mobile movement: Once fastened, the segments retain a degree of mobility, following the natural line of the vertebrae and ensuring no restriction in spinal movement.
• Material and weight: The segment weighs 280 grams, offering a good balance between durability and lightness, ideal for avoiding added strain on posture during the dive.
• Color: Gray, for a subtle look and good integration with spearfishing gear.
• Complete package: The product is supplied with pin and screw for immediate fastening on C4 collars.

Functionality and Benefits

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