STEALTH PRO SWIM FINS MEDIUM BLACK 7-8.5 SOFT FOOT POCKETS: The soft foot pocket features the unique Stealth drainage system allowing sand and broken shells to wash out. ANGLED BLADE: The unique angled blade is designed for maximum thrust and acceleration MAXIMUM THRUST: Right and left fins allow maximum thrust for minimum effort FINEST RUBBER: Stealth's original shape is made from the finest malaysian rubber for optimum power and projection