The Cetma Edge carbon fiber fins represent a true benchmark for spearfishers worldwide. As the very first model developed by Cetma Composites, the Edge stand out for their unique character: reactive, powerful, and extremely effective in the bottom kick-off, qualities that have made them famous among deep spearfishing enthusiasts. Over time, the Edge has confirmed its reputation as the ideal choice for those who want a fin that delivers immediate thrust and reliability, even in the toughest conditions.
Materials
The Edge blades are built with 100% IM7 carbon fiber, ensuring a perfect balance between lightweight structure, strength, and elasticity. The carbon is PRE-PREG with hot melt impregnation systems using micro-toughened tetra-functional resin, a solution that guarantees consistency and durability. Thanks to this aerospace-derived process, Cetma Composites produces fins that maintain their performance over time even under the stress of demanding dives.
Design
Cetma Composites integrates advanced engineering in the Edge blades through proprietary technologies:
- 3D-Tech: Exclusive technology by Cetma Composites, manufactured under high pressure, high temperature, and vacuum, resulting in a component with practically 0% voids, free of defects, and with a perfectly constant fiber/resin ratio throughout the blade.
- FEM Design: The blade design is optimized through finite element analysis (FEM), ensuring an optimal stiffness distribution that allows the blade to deform in a way that maximizes hydrodynamic efficiency.
- V profile carbon fiber layers: The carbon fiber layers are cut with rounded V profiles and positioned one on the other to create a progressive parabolic curve during the kick and ensuring best resistance and no weak points. The V profiles are easily visible on the blade surface.
The fins have precise dimensions: width 195 mm, length from the fold 742 mm, with an inclination angle of 27°. These specifications translate into a balance between comfort, reactivity, and high performance.
S-Wing foot pocket
The revolutionary S-Wing foot pocket by Cetma Composites is still today a good point of reference. Perfect wrapping of the foot, reinforced instep for best power transmission, maximum water flow optimization of the short side rails are just some of their key design elements.
Sizes
The Edge fins are available in multiple foot pocket sizes, ensuring the right fit for every diver and prolonged comfort during long sessions. Full details on sizes can be found on the official Cetma Composites website: Cetma Edge Sizes.
Water rails
The Edge is equipped with high-performance, variable height water rails designed by Cetma Composites to ensure optimal water channeling and stability. The height is high only at the start to connect to a profile of the foot pocket and at the tip of the blade, so the rubber of the water rail does not influence the reactivity of the carbon fiber blade.
Usage
The Cetma Edge fins are primarily conceived for deep spearfishing, where they fully unleash their potential. However, thanks to the Xsoft and Soft versions, the Edge can also be used for deep freediving, ensuring both comfort and performance. They are the perfect choice for spearfishers who want to instantly feel the fin’s power and make the most of its reactivity.
Stiffness and colors
The Cetma Edge fins are offered in four stiffness options to suit the needs of every freediver:
- Super soft (XS) and Soft (S): ideal not only for spearfishing but also for deep freediving.
- Medium (M) and Hard (H): for those seeking maximum power and responsiveness, especially during demanding descents and ascents.
In addition, the Edge is available in several color variations for the logo and water rails: Green, Magenta, White, and Cyan. This allows divers to combine top-level performance with personal style.
Up to 5 years Warranty
Cetma Composites also backs its product with a strong warranty:
- 2 years on carbon parts.
- 5 years if equipped with Cetma Composites foot pockets.
Conclusion
The Cetma Edge remains today one of the most loved and chosen fins by spearfishers all over the world. Combining cutting-edge materials, proprietary composite technologies, and unmatched performance in the bottom kick-off, they are the ultimate choice for those seeking reactivity, power, and reliability.
