Following the Impulse project Cressi has successfully transferred the same design parameters for S-shaped undulating deformation to this innovative fin. This particular movement permits a notable accumulation of elastic potential energy in the blade, which is released in the return kick, transforming into thrust. The thermoplastic rubber used for the water channelling rails is extremely flexible and soft so as not to undermine the intrinsic characteristics of the blade. Extremely thin and light blade in compound made of elastomerized technopolymers developed by Cressi Stringer consisting of technopolymers with elastomeric loads with high flexural modulus Footpocket / blade angle of 29 degrees Modular detachable fin Superior performance Superior comfort Self adjusting foot pocket