This project was the result of the exceptional experience of Martin Stepanek, one of the greatest competitive free-divers of all times, combined with the 30 years of experience of the C4 Carbon Fiber Fin Co. of Marco Bonfanti. Stepanek's signature fin features TR50-Hypertech Big Square, an even more responsive carbon fiber material compared to the already highly proven T700 adopted previously by C4. After a year of long testing, Martin carefully developed a fin with C4 that fit his needs and catered to the most important needs of free-divers and spearfishes from his experience in American waters. These fins are complemented with Blue Pathos fin pockets. Pathos foot pockets are the highest grade and lightest pockets available today in the market. The thin side rails allow for the carbon blades to flex easier hence offering the highest possible level of performance.
The blades have a medium stiffness that is ideal for Free divers weighing between 175 lbs. and 200 lbs. (79.4 kg to 90.72 kg) that require a balanced stiffness to complement their body weight and a mix of shallow, mid-depth, deeper diving to 100' (30 meters). The fins measure (L x W) 30.7" x 7.5" (780 mm x 190 mm) with a water rail height of 0.4" 10 mm) and a blade angle of 22° degrees. These non-vented full foot long fins are available in multiple sizes.