Spandex,Combed Cotton.Composition: Combed cotton(80%), Chinlon(16.5%),Spandex(3.5%) Us shoe size8-14.Breathable: Using top-grade long-staple cotton,spandex,Lycra fabrics and Environmental dyes .Moisture wicking technology keeps feet dry and fresh in any running conditions.Silver ion Anti-odorMesh Venting-tech:Anti-odor technology of silver ion, can quickly absorb sweat, keep your feet odorless in the hot summer.Daily ActivityThe socks are in great stretch and recovery. The best choice for running, walking, playing all kinds of balls, outdoor and inside activities. Cushioned sole and Non silp design for all day comfort and Suitable compression to provide the boost to your blood circulation.After-sale service: Order now and find the different on your feetIf you have any problem in size or quality ,Please contact us, We will send a replacement to you or refund you.We only want to give you the best service.