Hydro-Fit 101 Blue & Black Buckle Closure Classic Cuffs enhance the natural buoyancy and resistance of water, giving you more training benefits and making the most out of the time you spend in the water. They’re the hardest working gear we make. Versatile and durable—use them on your ankles, around your waist, on your arms or around your wrists. Cuffs do it all, in both deep and shallow water. Our Classic Cuffs feature a quick-release buckle closure for an extra firm fit. Classic Cuffs are the preferred choice if you work out aggressively in the water. When worn as a belt, Cuffs will fit up to a 54" waist.