Hydro-Fit 245 Easy-Close Cuffs with Velcro Closure (1 pair) HYDRO-FIT 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.