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Single Blade L-1090 for Freediving
The single blade L-1090 is designed specifically for spearfishing and freediving, available in three different stiffness options to match the thrust and response needs of each freediver.
Materials and construction: Made with selected materials to ensure lightness and mechanical strength, the blade provides effective power transfer and good responsiveness during finning. The choice of stiffness allows you to fine-tune the balance between flexibility and power, optimizing efficiency in the water.
Comfort and hydrodynamics: The blade design is engineered to reduce water resistance while maintaining smooth, fluid movement, supporting balanced trim and improved ergonomics during freediving dives.
- Available in 3 stiffness options to customize responsiveness
- Lightweight materials with high mechanical strength
- Hydrodynamic design for efficient power transfer
- Suitable for spearfishing and freediving
Prana Blades - Cetma Composites
The Prana Blades are an advanced model specifically designed for freedivers and spearfishers who demand uncompromising equipment in terms of quality and materials.
Materials and Construction
The blades are made of 75% carbon and 25% S-Glass, a high-strength fiberglass derived from the aerospace industry. Manufacturing involves an exclusive high-pressure, high-temperature vacuum process, with hot-melt impregnation using tetra-functional resin. This method ensures a defect-free component with a consistent fiber/resin ratio along the entire blade, providing strength and lightness.
Engineered Design for Efficient Kicking
The calibrated distribution of stiffness and mass along the blade promotes resonance within a range of natural frequencies that match the typical kicking frequency. This configuration optimizes thrust transmission, reducing fatigue and increasing the fluidity of movement underwater.
Water rails: constant-profile structure with a height of 10 mm, designed for optimal stability and trim control.
Blade dimensions: 667 x 185 mm, balanced to ensure efficient propulsion.
Variants
- Stiffness options: 25 soft and 30 medium to suit different thrust and kicking requirements.
- Logo and stringer colors: red, orange, and yellow.
Applications
The Prana blades are specifically designed to improve reactivity and hydrodynamic efficiency during spearfishing and freediving, making the kick smoother and less tiring even during extended sessions.
Prana Blades - Cetma Composites
The Prana Blades are an advanced model specifically designed for freedivers and spearfishers who demand uncompromising equipment in terms of quality and materials.
Materials and Construction
The blades are made of 75% carbon and 25% S-Glass, a high-strength fiberglass derived from the aerospace industry. Manufacturing involves an exclusive high-pressure, high-temperature, vacuum process, with hot-melt impregnation using tetra-functional resin. This method ensures a defect-free component with a consistent fiber/resin ratio along the entire blade, delivering strength and lightness.
Engineered Design for Efficient Finning
The calibrated distribution of stiffness and mass along the blade promotes resonance within a range of natural frequencies that match the typical finning frequency. This configuration optimizes thrust transmission, reducing fatigue and increasing the fluidity of underwater movement.
Water rails: constant-profile structure with a height of 10 mm, designed for optimal stability and control of trim.
Blade size: 667 x 185 mm, balanced to ensure efficient propulsion.
Variants
- Stiffness options: 25 soft and 30 medium to suit different thrust and finning requirements.
- Logo and stringer colors: red, orange, and yellow.
Applications
The Prana blades are specifically designed to improve responsiveness and hydrodynamic efficiency during spearfishing and freediving, making finning smoother and less tiring even during extended sessions.
Prana Blades - Cetma Composites
The Prana Blades are an advanced model specifically designed for freedivers and spearfishers who demand uncompromising equipment in terms of quality and materials.
Materials and Construction
The blades are made of 75% carbon and 25% S-Glass, a high-strength fiberglass derived from the aerospace industry. Production involves an exclusive high-pressure, high-temperature vacuum process, with hot-melt impregnation using tetra-functional resin. This method ensures a defect-free component with a consistent fiber/resin ratio along the entire blade, delivering strength and lightness.
Engineered Design for Efficient Finning
The calibrated distribution of stiffness and mass along the blade promotes resonance within a range of natural frequencies that match the typical finning frequency. This configuration optimizes thrust transmission, reducing fatigue and increasing the fluidity of movement underwater.
Water rails: constant-profile structure with a height of 10 mm, designed for optimal stability and trim control.
Blade size: 667 x 185 mm, balanced to ensure efficient propulsion.
Variants
- Stiffness levels: 25 soft and 30 medium to suit different thrust and finning requirements.
- Logo and stringer colors: red, orange, and yellow.
Applications
Prana blades are specifically designed to improve reactivity and hydrodynamic efficiency during spearfishing and freediving, making finning smoother and less tiring even during extended sessions.
Blades PULSE - Cetma Composites
The PULSE carbon blades by Cetma Composites are a true revolution in the world of spearfishing and water training. Designed and manufactured 100% Made in Italy, the PULSE introduce the Hyperbolic Curve: an exclusive geometry that delivers maximum thrust with minimal effort, redefining the concept of responsiveness for high-performance carbon blades.
Technology and Materials
The PULSE blades are built with a selection of aerospace-derived composite materials, chosen to ensure maximum hydrodynamic efficiency and the highest structural reliability in all conditions of use.
- 100% HM (High Modulus) and HR (High Resistance) Carbon: the optimal combination of stiffness and toughness for a blade that is responsive, reactive, and virtually indestructible.
- Hot Melt Pre-preg: the composite material is impregnated with hot-melt systems using high-performance resin, ensuring a consistent and optimal fiber/resin ratio across the entire blade surface.
- OOT Technology – Out-of-Autoclave Technology: an exclusive Cetma Composites production process that achieves the same quality standards as the aerospace industry without the use of an autoclave, optimizing control over the composite curing process.
ZDF Excellence – Zero Defects
The PULSE blades are produced with Cetma Composites’ proprietary ZDF (Zero Defects) technology. This aerospace-derived production standard ensures a component with 0% internal voids, free from structural defects and with a perfectly consistent fiber/resin ratio throughout the blade. The result is a blade that maintains its original mechanical characteristics over time, with no performance degradation.
FEM-Optimized Design
The geometry of the PULSE blades is the result of advanced design using finite element analysis (FEM – Finite Element Method). The structural simulation software used by Cetma Composites ensures optimal stiffness distribution, in order to reproduce a blade deformation profile that maximizes hydrodynamic efficiency during finning, both vertically and horizontally.
The Hyperbolic Revolution
The defining feature of the PULSE blades is the Hyperbolic Curve: a patented geometry that sets these blades apart from any other product currently on the market. Thanks to this shape, the blade delivers a unique biomechanical response, with instant responsiveness and powerful thrust from the very first kick. Ideal for spearfishing and intensive training sessions, the PULSE are designed for those seeking maximum performance without compromise.
Main Features
- Exclusive Hyperbolic Curve: maximum thrust with minimal effort
- 100% HM + HR Carbon: high elastic modulus and high mechanical strength
- Hot Melt Pre-preg: hot-melt impregnation for superior composite quality
- OOT Technology (Out-of-Autoclave): exclusive Cetma Composites aerospace production process
- ZDF Excellence – Zero Defects: 0% voids, defects, and structural discontinuities
- FEM Design: advanced finite element design for optimal hydrodynamic efficiency
- 100% Made in Italy
- Ideal for spearfishing and training
Single Blade L-1090 for Spearfishing
The single blade L-1090 is specifically designed for spearfishing, available in three different stiffness levels to suit different finning and resistance needs in the water.
The choice of stiffness allows you to optimize the efficiency and blade responsiveness, ensuring an ideal balance between power and comfort in thrust transmission during underwater movement.
This blade is made with selected materials to provide a combination of mechanical strength and lightweight performance, promoting a smooth, controlled fin stroke without causing excessive fatigue for the freediver.
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.
Blades for Freediving Fins
The blade is the component that determines the propulsive behavior of a freediving fin. The blade’s material, geometry, and stiffness directly affect the amount of energy transferred into thrust with each fin kick cycle. This selection includes blades in carbon fiber, Innegra, fiberglass, and plastic, from manufacturers specialized in freediving and competitive freediving.
Carbon Fiber Blades
Carbon fiber offers the highest elastic return coefficient among the materials available in this category: the blade stores energy during the loading phase and releases it as thrust during the propulsive phase, reducing muscle consumption at the same speed. The carbon fiber blades in the catalog cover a wide range of geometries and stiffness levels.
C4 offers the MB001 (80 cm) and MB002 (87.5 cm),the L-1090 Freediving and the Sportech Carbonio, all available in multiple stiffness levels.
Cetma is represented with four carbon fiber models: Taras, Lotus Carbonio, Mantra, and Prana. Cetma technology applies differentiated stiffness distribution along the blade axis.
DiveR offers pure carbon fiber blades with the Ultra Carbon, Carbon Copper Purple, and Carbon Tuna Time.
Pathos is represented with three carbon fiber blade models sold separately: Nero', Pro Ultimate, and Carbon Maximum, each available in 2-3 stiffness variants.
H Dessault offers four carbon fiber models with foot pockets included: Fast HD, Pershing HD, Tank HD, and Minimal HD, differentiated by blade geometry and intended use range.
Sigal Sub is represented with the carbon fiber Tsunami, available in 12 size and stiffness variants.
Innegra Blades
Innegra is a high-performance thermoplastic fiber that is laminated into a composite structure to produce blades with higher impact resistance than pure carbon fiber, with a slightly higher weight. It is a suitable choice for use on rocky bottoms or in intensive conditions. DiveR is the benchmark brand for this material, represented with six models: Innegra V2, Innegra Red (long version), Innegra Red Short, Innegra Red-R, Innegra, and Innegra Mermaid Black. All DiveR Innegra models are sold as separate blades, compatible with standard-mount foot pockets.
Fiberglass Blades
Fiberglass offers a more progressive flex than carbon fiber, with a wider margin for technical error. It is a suitable material for divers developing their finning technique and looking for less reactive but more predictable performance. C4 offers two fiberglass models: the FBG Umberto Pelizzari and the FBG Sportech, which combines a Sportech-geometry fiberglass blade with a dedicated foot pocket.
Plastic and Silicone Blades
Plastic and technopolymer blades are the entry point into the discipline: they have a lower cost than fiber blades, greater resistance to accidental impacts, and flexible behavior suited to learning and pool training.
C4 covers this range with the Umberto Pelizzari line in four versions - Black, Aurea, Sideral and Ghost - and with the silicone Wolverine, designed for pool training. Cetma offers the Lotus Plastica, the entry-level version of the Lotus line with a technical polymer blade and foot pocket included. Cressi is represented with the Gara Modular Impulse in two colorways, Blue Metal and Black: modular-system fins with interchangeable blades. Mares offers the X-Wing Pro, mid-range technopolymer modular fins.
How to Choose the Blade
The most critical variable in the selection is stiffness, which should be chosen based on body weight and leg strength. A blade that is too stiff will not flex completely during the kick, reducing thrust efficiency; a blade that is too soft will flex excessively, dispersing energy. Most manufacturers provide weight/stiffness correlation charts for each model. The material should be chosen according to technical level: plastic and fiberglass for those still learning, carbon fiber and Innegra for those who have already developed solid finning technique. Compatibility with the foot pocket is something to verify before purchase for models sold as separate blades.
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