Fox River Copper Guardian Pro Midweight Crew Socks with Wick Dry® (vented panels help reduce hot spots and blisters). URfit™ memory knit and arch support system. Comfortable spandex arch. Reinforced heel and toe. Flat toe seam. Cushioned sole. 41% copper CuTEC® polyester, 38% polyester, 19% nylon, 2% spandex. One pair. Fits Men's shoe size: M (6-8), L (9-11.5) or XL (12-14.5).