The support sleeve’s unique, advanced compression fabric, is bonded with copper, a natural and therapeutic element, to provide guaranteed support & to help the body recover faster from exertion and muscle & joint soreness. The lightweight, flexible support sleeve, snugly contours to your body to maintain constant, comfortable, nonslip, compression, while it stimulates aching joints & muscles, & helps speed recovery. Compression supports allow air to flow through the fabric whilst lets moisture escape to prevent chafing, making it comfortable enough to be worn all day.