NIUNIU 1.HIGH QUALITY: Made of premium foam, durable and lightweight, waterproof material ideal for swimming exercise. 2.EASY TO ADJUST: Equipped with buckle closure, more convenient to wear according to your arm or ankle size. 3.Can be used to suspend ankles, legs, wrists and arms during aquatic therapy. 4.ankle cuffs offer both flotation and weight resistance when used in water. Great for hydrotherapy, muscular development and aquatic training. 5.Safety swimming bands, perfect tool for learning swimming. quantity of delivery:1 piece(1pair) (Package contents: Only the above package contents, excluding other products.) size:160*75mm,inner diameter: 70mm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color:blue color (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)