High-quality material; foam material, will not chip, crack or be absorbed by water. Due to its superior quality and non-absorbent properties, the swim aqua cuff is perfect for you. Easier to adjust; Equipped with a buckle closure, it is more convenient to wear according to your arm or ankle size. HIGH QUALITY FUNCTIONALITY: Moderate resistance device is ideal for ankles or arms Versatile swim aid can be used to suspend ankles, legs, wrists and arms during hydrotherapy Great Companion for Beginner Swimmers: A pair of foam cuffs, perfect for water sports. These closed-cell foam cuffs are the solution to maintaining your body alignment in the water. And provides resistance for leg workouts and water aerobics. Widely used for general swimming: such as beach swimming, swimming lessons, etc.