fins C4, PRO TECH, carbon

PROtech – High-performance professional freediving fins

The PROtech are fins designed for athletes who live freediving as a discipline of precision. They come from a scientific study of water flows, with three-dimensional geometries that follow the natural movement of the body for maximum fluidity and efficiency.

The foot pocket distinguishes right and left foot for a real anatomical fit: no pressure points, no energy dispersion. The structural monoblock blade–foot pocket guarantees instant thrust transmission.

The fins float in a controlled way thanks to lateral hydrodynamic stabilizers, maintaining trim and stability both in the pool and in depth.

The blades are made 100% of high-quality carbon with multilayer layering, for progressive energy release, without vibrations.

The result: maximum performance with a smooth, continuous and technical kick.

Key points

• Right/left anatomical foot pocket

Fit designed like a sports shoe to eliminate energy dispersion and increase comfort and efficiency.

• Monoblock blade–foot pocket

Permanent structural bonding that guarantees immediate force transmission, without flexion or delays.

• Three-dimensional hydrodynamic geometry

Curves and inclinations on three axes that follow the body and the water flow, reducing fatigue and improving movement fluidity.

• Controlled buoyancy

The fins are not neutral by chance: they float thanks to engineering interventions (stabilizers + balancing elements in the tip).

• High-performance multilayer carbon

100% carbon fiber with oriented layering to balance stiffness and flexibility, with progressive energy release.

• Performance on continuous kick

These fins DO NOT give maximum performance with “broken / aggressive kicks” but with smooth, continuous and clean movement.

• 100% Made in Italy by C4

The production of carbon fiber and fiberglass C4 blades has always been carried out in our production department in Italy.
In recent years, a new department dedicated to plastic material molding has also been started, where foot pockets, UP blades, overmolding for freediving collars and many other components are also produced.

Made for those who seek their own limit
The PROtech are not for everyone. They are designed for those who live freediving as a discipline of precision. For those who measure every meter. For those who seek their own limit and go where others stop. For those who seek only excellence, without compromise.

Shapes born from water
The design of the PROtech is born from a scientific study on the movement of water and of the human body in immersion. From the tip to the foot pocket, every curve has been shaped to follow the water, not fight it.

Competition fins do not move in a linear way but oscillate generating vortices and flow deviations. This is why we have abandoned the classic “drop shape” and designed a three-dimensional geometry capable of working at its best even in turbulent flow conditions.

Right and left foot pocket: you can feel the difference
Like running or cycling shoes, our fins also distinguish between right and left foot. We created molds for anatomical shapes in every size, obtaining a precise and natural fit. The foot is wrapped like in a glove, with no empty spaces or painful pressure points.

In an environment where every watt counts, the correct anatomical fit eliminates any dispersion: the foot works in total symbiosis with the blade.

The result? More comfort, more efficiency, less energy dispersion.

For the foot pockets we chose natural rubber with high hardness, because it is the only one that guarantees an instant transmission of thrust. Thanks to the right and left fit, even with this rigid structure, comfort is surprisingly high, to the point of being usable not only for the time necessary for competition but also for prolonged training sessions. Pain reduces relaxation and, consequently, freediving suffers from it.

Hidden angles, intelligent geometries
In the PROtech, the foot is positioned relative to the blade on a curved, inclined and rotated structure in space. There is not a single “blade angle”: there is a set of inclinations designed to follow the natural mechanics of the body.

Deliberately, the foot is rotated on three axes relative to the blade: forward, laterally and in torsion. This controlled posture improves ergonomics and force transmission, giving the kick a smoother, more powerful and less fatiguing movement.

A single block: blade + foot pocket
In the PROtech, the blade and the foot pocket are not separated: they are glued structurally and permanently. This allows an instantaneous transmission of force, without dispersion.

Every modular system introduces micro-movements, unwanted flexion and delays in response. With structural bonding, the fin becomes one with the athlete’s foot.

They float, and they do it for a reason
In depth or in the pool, a floating fin has important advantages: in dynamic, it helps to maintain trim without effort; in depth, it reduces the downward drag effect, improving the ascent.

We inserted lateral hydrodynamic stabilizers and internal elements in the tip of the foot pocket to counteract the negative thrust of carbon. The result is a fin that maintains trim and buoyancy without deforming.

Carbon and layering
The PROtech blades are made 100% of high-quality carbon fiber. The dedicated layering is designed to maximize elastic response, with optimal energy return in the typical freediving movements.

Not all carbon fins are equal. Our layering is multilayer, with differentiated fiber orientation to balance stiffness and flexibility. This ensures progressive and controlled behavior, ideal for smooth and continuous movements, without vibrations.

Kick as they were designed
The PROtech give their best with a continuous, soft and precise kick, not a broken one. They are designed for those who have a clean technique and want to enhance it.

Thanks to controlled elasticity and to the geometry of the blade-foot pocket system, thrust is more effective with medium frequency, with low energy consumption. In tests, efficiency was maximum with limited amplitude and regular rhythm.

WR (Water Rail): present, but not protagonists
The lateral profiles are designed to guide the water and not block it. They are low, thin and shaped to increase stability without braking the water.

In summary, what makes them different?

• Right and left foot pocket with real anatomical fit
• Structural monoblock blade-foot pocket
• 3D hydrodynamics studied
• Controlled buoyancy, even in depth
• High-performance carbon layering
• Specific performance on smooth kick technique