★Warp Fin Rubber Fins for Advanced Divers The long blade accentuates your personality, and has an unlimited simplicity. The top-level performance warp fins are a rubber fin, which allows you to maximize the diver potential. The supple, rubber generated overwhelming power and incredible speed bring the sea-loving divers into an impressive area. Different colors have different hardness of fins. If you are concerned about rubbing on the heel or instep, you can pair it with mudu boots. Hardness is similar to normal mu Softest warp fins for water transfer and flipper