The revolutionary design of the Oceanic Manta Ray fin was inspired directly from the shape and bio-mechanics of marine animals. By combining three different materials to simulate bone, tendon and fin, we’ve created a blade design that provides maximum power, speed & efficiency while also remaining extremely lightweight & durable.POWER-X SYSTEMBy replicating the motion of the foot's tendons and joints, revolutionary material optimizes propulsion by flexing during the downstroke and releasing stored energy prior to the upstroke.POWER CHANNELThe flexible material simulates the skin's elasticity by directing water flow off the back of the blade for increased thrust.