Engineered with an intermediate blade to promote increased tempo and speed through the legs when moving through the water, LFCROSS fins help swimmers to maintain the resistance necessary to build leg power and improve technique. With a 100% Natural Rubber construction and new thickened foot pockets, the Crossblade Fin prevents athletes from feeling discomfort as they move. In addition to an innovative rounded edge design, each fin is also created with a universal, no-slip grip on the heel base.