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Ultrastretch C4 Undersuit for Freediving and Spearfishing
The Ultrastretch C4 Undersuit is made with smooth neoprene on the outside and stretch-lined neoprene on the inside, delivering an excellent combination of comfort and flexibility. The pre-shaped cut is designed to fit the body perfectly, with extra length in the pelvic area to optimize thermal retention during freediving sessions and spearfishing activities.
The longer design over the pelvis improves thermal protection under the wetsuit, making it especially useful during seasonal transitions or for those who prefer to avoid overly thick wetsuits. This undersuit is compatible with most wetsuits on the market, making it extremely versatile and practical for freediving or spearfishing.
Technical features
- Material: smooth neoprene on the outside, stretch-lined neoprene on the inside
- Thickness: 2 mm
- Pre-shaped cut with extended coverage in the pelvic area for greater thermal protection
- Suitable as an undersuit for all types of wetsuits
The stretch of the fabric ensures freedom of movement and unrestricted comfort during dives, while the reduced thickness provides lightness and quick donning. The Ultrastretch C4 undersuit helps keep body temperature stable, increasing the efficiency of your freediving and spearfishing sessions.
P. Channel Valve in 3.5 mm Split Neoprene
The P. Channel Valve is made from split Neoprene with a thickness of 3.5 millimeters, specifically designed to meet physiological needs during freediving and spearfishing sessions.
This technical accessory eliminates the need to get out of the water to remove your wetsuit, improving practicality and continuity during the dive.
The valve is easy to apply to the wetsuit, ensuring quick installation without compromising seal or comfort during underwater activity.
The black color provides a discreet, uniform look with most freediving wetsuits.
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.
Ergonomic Salvimar Drop Back Weight
The Salvimar Drop Back Weight is designed to provide optimal support during freediving and spearfishing, especially in shallow water and in conditions requiring heavy wetsuits typical of the winter season.
Made with neoprene shoulder straps, it offers excellent ergonomics and comfort, ensuring a precise fit that reduces back fatigue during extended dives.
Main Features
- Ergonomic back support for even distribution of wetsuit pressure
- Neoprene shoulder straps for superior comfort and body adaptability
- Essential for use with heavy wetsuits in cold water or for shallow-water dives
- Available in 3 sizes: S-M, L-XL and XXL, for a perfect fit
Salvimar Drop Shorts in 2.5 mm Double-lined Neoprene
The Salvimar Drop Shorts are made from 2.5 mm double-lined Neoprene with a pre-shaped cut designed for freediving and spearfishing. This technical garment is designed to improve the wetsuit’s thermal seal, reducing water entry between the pants and jacket.
Thanks to its sealing function, the shorts help limit water flow, increasing thermal comfort and allowing longer breath-hold sessions in cold water or low-temperature conditions.
Main Features
- 2.5 mm thick double-lined Neoprene for improved insulation and durability
- Pre-shaped cut for an optimal fit and freedom of movement in the water
- Sealing function to reduce water entry between pants and jacket
- Increases thermal comfort during freediving and spearfishing sessions
- Available in sizes M, L, XL and XXL
P. Channel Valve in Split Neoprene 3.5 mm
The P. Channel valve is made of split Neoprene with a thickness of 3.5 millimeters, designed specifically for use during freediving and spearfishing. This accessory allows you to manage physiological needs without leaving the water or having to take off your wetsuit.
The valve is easy to apply to the wetsuit, ensuring practical, quick installation. The Krypsis Camo color helps it blend into underwater environments during spearfishing sessions.
H. Dessault 6 kg HD Back Weight for Spearfishing
The 6 kg HD Back Weight by H. Dessault is designed specifically for spearfishing, providing stable and comfortable support during dives. Its structure features a semi-rigid insert that prevents deformation even under full load, ensuring better distribution of ballast weight and ergonomic contact with the back.
Technical Features and Materials
- Rigid internal support to maintain shape and support the ballast weight without deformation
- 4 neoprene weight pockets with cut-resistant lining, designed to provide mechanical durability and secure closure via Velcro tab
- Draining airnet padding in contact with the back to improve thermal comfort and breathability during freediving
- Adjustable elastic shoulder straps made from marine-grade elastic webbing, designed to adapt to different body types while providing a precise and flexible fit
- Additional rear Band for attachment to the weight belt or crotch strap, increasing the stability of the back weight during dives
Functional Advantages
The combination of a semi-rigid insert with technical materials such as cut-resistant neoprene and airnet ensures lightness, durability, and comfort even during extended dives. The weight pockets allow for a distributed and stable load, while the elastic shoulder straps ensure freedom of movement without sacrificing a customized fit. The rear elastic band helps maintain ideal trim in the water, which is essential for effective spearfishing.
Ergonomic Salvimar Krypsis Back Weight
The Salvimar Krypsis Back Weight is a technical accessory designed to ensure comfort and support during freediving and spearfishing, especially in shallow water or with the heavy wetsuits typically used in winter conditions.
Made with neoprene shoulder straps, it provides an ergonomic fit and excellent pressure distribution across the back, improving stability and freedom of movement during the dive phase.
The Back Weight helps reduce back fatigue, making prolonged use of spearfishing and freediving equipment easier in cold-water environments or with stiffer wetsuits.
Main features:
- Padded neoprene shoulder straps for enhanced comfort
- Ergonomic design to adapt to the shape of the back
- Available in two sizes: M-L and XL-XXL
- Essential for shallow-water spearfishing and for use with heavy wetsuits
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
Light Back Weight in Neoprene with 4 Lead Weight Pockets
The Omer Neoprene Back Weight is designed to ensure proper ballast distribution during freediving and spearfishing. Equipped with four internal pockets, each can hold up to 2 kg, allowing the use of both traditional belt lead weights and weight plates.
The Neoprene construction provides a good balance of stretch and comfort, promoting a better fit and freedom of movement during descent and ascent. The Back Weight helps reduce the load on the back, preventing overload and improving comfort in the water.
Technical features
- Material: high-stretch Neoprene for proper body adaptability
- Load capacity: four internal pockets with a capacity of up to 2 kg each
- Compatibility: accepts traditional belt lead weights and dedicated plates
- Optimal ballast distribution for improved underwater posture
- Makes weight management easier by reducing back fatigue during freediving
Anatomical Modular Back Weight for Spearfishing
The anatomical modular back weight is a neoprene accessory designed for optimal weight management during spearfishing sessions. Thanks to its modular construction, it allows balanced weight distribution, improving stability and comfort in the water.
Technical Features
- Equipped with four dedicated pockets for inserting standard ballast, compatible with 0.5 kg or 1 kg weights.
- Total load capacity up to 4 kg of lead weights, ideal for adjusting ballast according to your body weight and the type of spearfishing practiced.
- Made of neoprene, a material that ensures comfort and mechanical resistance during the dive.
- Quick-release system that improves safety, allowing fast and easy removal in any situation.
- Complete with elastic cord for securely attaching the back weight to the belt, preventing unwanted movement during the hunt.
- Anatomical design that fits perfectly to the back, optimizing load distribution and reducing fatigue and ballast shifting.
- Available in Camu Illusion color to improve underwater camouflage.
Benefits for Spearfishing
The modular back weight allows effective ballast management, essential for maintaining proper trim and ensuring smooth movement underwater. The quick-release system is an essential safety feature, making it easier to immediately ditch the ballast if needed.
The elastic retaining cord ensures the back weight stays stable, preventing shifting that could compromise finning efficiency and overall performance during spearfishing.
Omer Neoprene Back Weight with Four Lead Weight Pockets
The Neoprene back weight made by Omer is designed specifically for ballast distribution in spearfishing and freediving, preventing localized overload on the back. The structure features four internal pockets, each capable of holding up to 2 kg of weight, compatible with both plates and traditional belt lead weights.
The Neoprene material provides a good balance of elasticity and thermal comfort during dives. The outer covering features a Camu 3D color finish, designed for a camouflage effect suitable for diving in natural environments.
Main features
- Four internal lead weight pockets, each with a capacity of up to 2 kg
- Compatible with dedicated plates and classic belt lead weights
- Neoprene construction for elasticity and thermal comfort
- 3D camouflage finish for underwater concealment
- Available in four sizes for an optimal fit: S-M, M-L, L-XL, XL-XXL
Benefits for underwater use
The back weight allows effective ballast distribution, improving trim and stability during the dive. By reducing the load concentrated on the back, it promotes a more natural posture and greater freedom of movement for the spearfisher. The use of integrated weight systems also facilitates spearfishing and freediving, optimizing balance and efficiency in the water.
Anatomical Modular Back Weight for Freediving and Spearfishing
The anatomical modular back weight is designed to optimize ballast management during spearfishing and freediving sessions, providing even weight distribution across the body to improve comfort and balance in the water.
Technical Features
- Made from neoprene to ensure stretch and comfort
- Equipped with four modular pockets, each suitable for standard 0.5 kg or 1 kg weights, for a maximum total ballast of 4 kg
- Quick-release system allowing rapid removal of the back weight, increasing safety in the water
- Elastic cord for securing the back weight to the belt, keeping it stable during finning and underwater movements
- Anatomical weight distribution to improve trim and stability in the water
- Black color, ideal for maintaining an unobtrusive underwater profile
Benefits for the Freediver and Spearfisher
This back weight ensures precise ballast balance, essential for efficient finning and thermal comfort during the dive. The flexible neoprene provides a comfortable fit and adapts to body shape, while the quick-release system makes immediate removal easier when needed, increasing safety. The elastic cord prevents unwanted ballast movement, keeping the device in position throughout the entire spearfishing session.
Mares 2 mm Neoprene Undersuit
The Mares undersuit is made from 2 mm thick neoprene, with a lined exterior and open-cell interior. This construction provides an optimal balance between thermal insulation and light weight, helping maintain proper thermal comfort during freediving and spearfishing sessions.
Designed to be worn as an additional thermal layer under the wetsuit, the undersuit increases insulation performance, allowing you to extend your time in cold water or during the winter season without compromising comfort or freedom of movement.
Technical features
- Thickness: 2 mm
- Material: Neoprene with lined exterior and open-cell interior
- Available Sizes: S, M, L, XL
Benefits for freediving and spearfishing
The open-cell neoprene interior increases the elasticity of the undersuit, ensuring a better fit and freedom of movement during descent and ascent. The material’s light weight reduces bulk and drag in the water, promoting a smoother finning action and better underwater buoyancy control.
In addition, the thermal insulation provided by the undersuit helps reduce body heat loss, offering greater comfort even during longer sessions and in low-temperature waters.
Best Hunter Spider Back Weight for Spearfishing
The Spider Back Weight is designed specifically for shallow-water spearfishing, ensuring comfort and functionality during the dive. Made from 3.5 mm thick material, it offers a good balance between elasticity and mechanical resistance, providing a snug, stable fit during underwater movement.
Technical Features
- Ballast capacity: allows you to carry up to 6 kg of lead weights
- Lead weight pockets: equipped with 6 dedicated pockets for even weight distribution, improving trim and stability in the water
- Fastening system: chest clip and belt clip for secure, adjustable positioning of the back weight
- Material: 3.5 mm thickness, optimized for the balance between elasticity and durability
- Available sizes: M, L, XL to fit different body types
Benefits for Freediving and Spearfishing
The back weight ensures balanced weight distribution along the back, promoting fluid movement and reducing fatigue during long periods underwater. The clip system ensures a precise, customizable fit, increasing safety and practicality during spearfishing.
The 3.5 mm material provides good elasticity while maintaining adequate mechanical resistance, essential for absorbing stress and making movement easier in shallow-water environments without limiting freedom of movement.
Neoprene Loading Pad for Loading Spearfishing Spearguns
The Loading Pad in Neoprene is a technical accessory designed to be worn over a wetsuit or directly against the skin, increasing comfort when loading a band-powered speargun. Its added thickness protects the chest, providing a soft, durable surface where the speargun butt is placed during band loading.
This support is especially useful when used without a wetsuit or in warm water, when you prefer to wear only a rash guard. In these situations, the Loading Pad provides protection and comfort, helping prevent abrasions or discomfort caused by mechanical stress on the chest during loading.
Technical Features
- Made from Neoprene suitable for underwater use
- Protects the chest from direct contact with the speargun butt
- Helps ensure a secure, stable grip when loading a band speargun
- Compatible with wetsuits and thin garments such as rash guards
- Lightweight and durable, without restricting mobility
- Rob Allen production, a guarantee of quality and durability
- Made in South Africa
Mares Illusion Bermuda Shorts in 2 mm Neoprene
The Mares Illusion Bermuda Shorts are made from 2 mm thick camouflage Neoprene, with an outer lining and a smooth inner surface, providing a balanced mix of comfort and stretch during freediving and spearfishing activities.
The pre-shaped cut ensures an ergonomic fit and greater freedom of movement in the water, improving comfort for the spearfisher during extended dives.
Weight Pockets
The garment is equipped with side pockets designed to hold standard 500 g or 1 kg weights, making it easier to customize buoyancy and allowing for more precise trim during dives.
Thermal Function and Protection
The bermuda shorts help reduce water entry between the pants and jacket, increasing the overall thermal performance of the wetsuit. This feature is essential for maintaining better thermal protection during freediving sessions.
Technical Specifications
- Neoprene thickness: 2 mm
- Outer lining: camouflage
- Inner lining: smooth
- Pockets for 500 g or 1 kg weights
- Pre-shaped cut for greater comfort and fit
- Last available size: S
Hood in Neoprene Omer UP-H1 2.0 mm
The Omer UP-H1 hood is made from 2.0 mm Neoprene with a smooth-skin interior lining, designed to ensure comfort and ease of use during freediving and spearfishing. The hood’s construction provides an ergonomic fit, essential for reducing water entry and improving thermal sealing.
The design includes strategically placed air-release holes, which make donning easier and prevent annoying air pockets from building up inside, improving compression and fit around the head. This feature is especially useful in freediving, where managing the balance between thermal insulation and comfort is essential.
Main technical features
- Thickness: 2.0 mm Neoprene
- Inner lining: smooth skin, ideal for comfort and softness against the skin
- Available Sizes: Small, Medium, Large
- Air-release holes positioned to make donning easier without compromising the seal
- Compatible with freediving and spearfishing wetsuits and gear
The hood is part of the Umberto Pelizzari line, synonymous with reliability and technical design specific to underwater disciplines such as freediving and spearfishing.
Ultrastretch C4 Undersuit with Hood
The Ultrastretch C4 undersuit is designed with a pre-shaped cut, featuring greater extension in the pelvic area to ensure enhanced thermal protection during freediving and spearfishing sessions. The integrated hood further improves insulation and thermal comfort.
Made with 2 mm smooth Neoprene on the outside and lined internally with stretch material, this undersuit provides excellent elasticity and freedom of movement, making it easy to wear under any type of freediving wetsuit.
Thanks to its construction and calibrated thickness, it is ideal during seasonal transitions or for those who prefer balanced thermal protection without switching to thicker wetsuits. Its lightweight design and ease of use help optimize comfort in the water while maintaining good thermoregulation efficiency.
Main technical features
- 2 mm smooth Neoprene exterior for mechanical resistance and hydrodynamic performance
- Stretch inner lining for improved fit and comfort
- Pre-shaped cut with greater length in the pelvic area for enhanced thermal protection
- Integrated hood for effective coverage and insulation
- Compatible with all wetsuits currently on the market
- Available in four sizes: 2, 3, 4, and 5
3mm double-lined neoprene seat cover with water-repellent coating
Made from 3mm double-lined neoprene with an outer water-repellent nylon coating, this seat cover is specifically designed for spearfishing enthusiasts. It provides effective protection for car seats against water, sand, and dirt from wearing a wetsuit during transfers.
The neoprene material ensures excellent mechanical resistance and long-lasting durability, while remaining lightweight and practical. The water-repellent nylon coating also helps liquids slide off, preventing absorption and keeping the vehicle interior clean.
This seat cover allows quick transfers without the need to change, letting you wear your wetsuit directly in the car. The ideal solution for anyone who practices spearfishing and needs to keep the vehicle interior clean without sacrificing comfort and functionality.
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.
Wetsuit Pants Valve - "Pee Valve"
The valve, commonly known as a "pee valve," is designed to be installed on wetsuit pants, allowing you to urinate without having to remove your entire setup. This accessory helps maintain thermal insulation and protection during spearfishing and freediving sessions.
Its simple installation ensures practicality and extended comfort, which is especially important during cold-water dives, where any heat loss can compromise the duration and safety of the underwater activity.
This technical component is essential for long-duration dives, preventing interruptions and minimizing body heat loss, thereby improving efficiency and performance during spearfishing.
The wetsuit valve is an essential item for freedivers and spearfishers diving in cold-water conditions, ensuring comfort and uninterrupted use.
Neoprene Accessories for Spearfishing
In a spearfisher’s kit, alongside the wetsuit and fins, there are a number of neoprene accessories that perform specific and often underestimated technical functions. Back Weights weight systems, undersuits, bermuda shorts, and pee valves are supplementary components of spearfishing equipment, each with a specific role related to thermal management, weight distribution, or body protection during spearfishing.
Unlike gloves or socks, which fall into dedicated categories, the neoprene accessories collected in this section cover complementary needs: increasing the thermal insulation of the main wetsuit, carrying weight in a balanced way on the body, or protecting the areas most exposed to cold. These items make a real contribution to comfort and time in the water, especially during long sessions or in colder seasons.
Product Types
Neoprene Undersuits
The undersuit is a thin neoprene vest worn under the main wetsuit to increase thermal insulation. The models in this category feature moderate thicknesses from 2 to 3 mm, with lined/open-cell or smooth-skin/lined neoprene construction.
Some models are also available with an integrated hood, increasing thermal coverage for the head.
Weight-Carrying Back Weights
The Back Weight is a neoprene accessory worn on the back, with integrated pockets or supports for positioning lead weights. Unlike a traditional weight belt, the Back Weight distributes weight over a larger area of the body, reducing the amount of lead needed on the belt during shallow-water spearfishing sessions.
This category includes models in neutral colors and camouflage models, useful in situations where the spearfisher’s visibility to fish may affect the outcome of the session. Some models integrate neoprene fringes that imitate Posidonia seagrass, helping conceal the spearfisher.
Neoprene Bermuda Shorts
Neoprene bermuda shorts are mid-thigh shorts usually worn over the wetsuit, providing additional thermal protection for the lower back, hips, and thighs. One of their key functions is to seal the wetsuit, helping prevent water from entering between the jacket and pants. When needed, they can also serve as a pocket for carrying small items. Some versions are available in camouflage, made with neoprene printed with a camouflage pattern.
Pee Valves (Drain Valves)
A pee valve is a neoprene valve that can be applied to the wetsuit, allowing urine to drain without having to partially open the wetsuit to urinate, which would let in cold water and reduce thermal insulation. This category includes models in black and camouflage versions.
How to Choose Neoprene Accessories for Spearfishing
The choice of neoprene accessories mainly depends on three factors: the water temperature where you fish, the type of wetsuit you already use, and the spearfishing technique practiced.
- Water temperature: in water temperatures that are not suitable for the wetsuit thickness, adding an undersuit and bermuda shorts helps limit heat loss, allowing longer sessions. In summer, when the water is warm, these accessories may not be necessary.
- Type of wetsuit already in use: in water temperatures that are not too cold, a 3 mm wetsuit paired with a 2 mm undersuit provides torso insulation equivalent to a 5 mm wetsuit, with the advantage of better mobility compared to a single, thicker suit. Likewise, in winter, the insulation of a 5 mm wetsuit can be increased by adding an undersuit, bringing the neoprene thickness on the torso to 7 mm without needing to purchase a full winter suit.
- Back Weight: spearfishers who carry out long shallow-water ambush sessions will benefit from using a Back Weight, which distributes ballast by placing part of it over one of the areas of the body most prone to buoyancy (the lungs), significantly improving the spearfisher’s trim during this technique.
- Drainage needs: pee valves are especially useful with two-piece wetsuits (jacket + pants), where urinating inside the wetsuit is not recommended, and at the same time partially opening the wetsuit to urinate is also not recommended because it allows cold water to enter.
Available Brands
This category includes products from the following brands:
- Mares: offers the 2 mm neoprene undersuit with lined exterior and open-cell interior construction, and weight-carrying Back Weights in the Illusion and Black versions. Mares is a benchmark brand in underwater equipment, with a long history in the spearfishing segment.
- C4: featured with Ultrastretch undersuits (with and without integrated hood), the winter cap, and the Marco Bardi fringed Back Weight. C4 is an Italian brand specializing in spearfishing and freediving equipment, known for its use of highly elastic neoprene.
- Salvimar: offers the Krypsis Back Weight in camouflage version, the Drop Back Weight, the Drop bermuda shorts, and the P.Channel Black and Krypsis Camo pee valves. Salvimar is an Italian brand focused on spearfishing equipment, with a camouflage line recognizable for its Krypsis camo pattern.
- Omer: offers the UP-H1 neoprene hood, designed to fit different types of wetsuits. Omer is an Italian manufacturer with decades of experience in the spearfishing sector.
- Rob Allen: featured with the chest loading pad, a specific neoprene accessory designed to protect the chest area when loading band-powered spearguns.
- Best Divers: offers the Spider Back Weight in camouflage version, available in three sizes.
Conclusion
Neoprene accessories for spearfishing are a technical component often overlooked when assembling equipment, but they are highly relevant for comfort, thermal management, and ballast distribution during spearfishing sessions. Undersuits, Back Weights, bermuda shorts, hoods, and pee valves are complementary solutions that, when paired with the main wetsuit, allow the equipment to be adapted to seasonal conditions, water temperatures, and the spearfisher’s individual preferences.
