Performance blade with cetacean tail inspired hydrodynamic design for better boost and reduced drag; Dual material technology with wide side gliding zones, reinforced rails for stability, and central rubber section for improved efficiency; Adjustable open heel with rotating buckle and quick adjustment system, large adjustable range, quick release pin design; Central drain hole for light, efficient gliding and easy rinsing with no sand or residual water; Dual material coupling prevents elastic element perishing and fin delamination; Made in Italy with REACH certified materials