Mares Wave fins feature a tri-material construction design which uses three materials to apply specific properties where needed. The upper part of the foot pocket is especially molded in soft rubber to guarantee the maximum comfort. The blade has big soft rubber insert perfect to get the ideal Superchannel water flow. The remainder of the fin blade has the rigidity and strength needed for superior propulsion. The straps feature ABS Plus (Adjustable Binding System) buckles for one step quick and easy opening or closing.