Tusa X-Pert Zoom Z3 Open Heel Split Fins: * Combines: Propeller-Fin Technology, TUSA"s Multi-Flex Blade System and Patented Angled Blade Design * X-Pert Fin Provides Speed and Power with Less Effort and Fatigue * Generates Maximum Performance and Comfort with Minimum Strain on the Leg Muscles * Allows Small Bent-Knee Kick with a Light Rhythm