U.S. Divers Shredder FTF Float Tube Fin Adult fin with dual-composite split blade for float tube fisherman Split blade's flex zones cup and channel water efficiently for minimal turbulence Engineered to deliver excellent power while you conserve energy Enlarged foot pocket, easy-adjust foot strap, and built-in leash system Fits over water boots; available in sizes 8 to 13; 2-year limited warranty