The Nike Classic II Sock in Black Jersey Gold is designed with a dynamic arch and lightweight cushioning for a supportive fit and feel. Dri-FIT technology helps keep feet dry and comfortable, and an anatomical fit ensures a snug fit. Cushioning in high-wear areas helps absorb impact. The dynamic arch provides a supportive fit and feel. Anatomical left and right socks are designed for a natural fit. Fabric: 97% nylon/3% spandex. Reinforced heel and toe. Machine washable.