Sierra Socks Compression Ankle Sleeve Brace Support with Copper 26-34 mmHg Made in USA 45% Nylon, 28% Spandex, 27% Copper Poly Made in USA Machine wash, warm with like colors. Non chlorine bleach. Tumble dry low. Copper infused helps relieve symptoms of Arthritis such as pain and inflammation. Anti Bacterial & Anti Microbial. Contoured to fit ankle w/o binding or slipping while providing support for prolonged use. Closed heel for proper fit & seamless design for firm, comfortable, even compression. Thin lightweight material fits comfortably in shoe with smooth edges for comfortable everyday multi purpose use. MEASURE ANKLE CIRCUMFERENCE FOR SIZING. PROUDLY MADE IN THE USA.