Duro-Med Industries" amazing TheraBeadsDuro-Med Microwaveable heat products represent a major breakthrough in moist heat therapy. Without the use of water or electricity, TheraBeads delivers moist heat safely and effectively. By utilizing the convenience of a microwave oven, TheraBeads provide therapeutic moist heat at the correct temperature levels needed for effective therapy. Specially contoured for aching neck and shoulder muscles. Fully adjustable with closure to prevent slippage. Includes cover.