The Tynor Weight Cuff is made up of PUF fused fabric which provides good cushioning and durability. The steel balls and fillings inside the weight and tightening strap ensure complete safety and do not cause injury. It is ideal for exercise, for general physiotherapy and rehabilitation. It can also be used during the normal daily routine to improve muscle mass, strength, muscle tone and stamina. The weight is in comfortable wrapping that is soft on skin and doesn't cause any kind of irritation or discomfort.