Arena fins arena powerfin pro ii training fin black the fins competitive swimmers have been waiting for. The arena powerfin pro ii are the fins all competitive swimmers have been waiting for. Their design features a sloping surface and hydrodynamic profile so that you can swim with a faster leg kick and better control. The open heel ensures the best possible ankle flexibility, allowing faster upward motion together with a more powerful downward leg kick. Training your legs vertically using the powerfin pro ii during your sessions will help improve your underwater phase, letting you control body position and perfect proper leg kick technique. Built for competitive swimmers. Built for results. Inclined short blade open heel design maximum flexibility high-frequency kick 100% silicone pvc free 3 key features inclined blade for forward thrust the sloping blade surface is engineered to generate maximum forward thrust with every kick. The inclined angle promotes a high-frequency kick pattern that mirrors race-pace technique. This makes the powerfin pro ii equally effective for sprint sets and technical drillwork. Open heel for ankle flexibility the open heel design removes any restriction around the ankle, allowing the fullest possible range of motion during both upward and downward kick phases. Greater ankle flexibility translates directly into a more explosive and efficient leg drive. This freedom of movement is particularly valuable when working on underwater dolphin kick. V...