[ERGONOMIC DESIGN] Compared with others on the market, Our Swim Aquatic Cuffs are ergonomically designed with a recessed structure, enabling it to fit around the ankle, wrist or arm. Stronger wrapping keeps the cuff stay in place when using in the water. [HIGH DENSITY MATERIAL] The Aquatic Cuffs are made of High Density EVA foam material , which is lightweight, portable, odorless, non absorbent, suitable for a variety of water sports. It is safe and durable, ensure long life when used in pool water. [EASY TO ADJUST & WEAR] Float ring pulled apart to expand size,The inner circumference size can be adjusted to a range from 8 in20cm to 13 in 33cm. Perfect for arm and ankle sizes. Adjustable size design allows you to easily put on and take off the Water Ankle Weights conveniently. [WIDELY RANGE OF USE] The aquatic feet cover provides float and weight resistance, widely used in general swimming, beach swimming, swimming lessons. [SWIMMING HELPER] Great for hydrothera