High quality: made of high quality soft closed cell foam to ensure long life in swimming pool water. Versatility: these sleeves are ideal for swimmers with limited finger control and power, and are a solution to keep the body aligned in the water. The package includes one pair, 2 pcs ankle bands, this can help your body well when swimming. Swimming assistant: the first choice for swimmers with limited finger control and strength. Able to hanging ankles, legs, wrists and arms during aquatherapy. Adjustable: quick release button makes it very convenient for you to put on or take off the cuff. It's easier to adjust, and it's more convenient to wear according to the size of the arm or ankle.