Keep your focus on your game, not on uncomfortable feet. Dynamic Arch Bridge for support. Reinforced heel and toe for enhanced durability in high-wear areas. Anatomical left and right socks for superior fit and cushioning. 77% nylon, 18% polyester, 5% Lycra. Machine wash cold, tumble dry low. Product measurements were taken using size L (Men's 8-12, Women's 10-13). Please note that measurements may vary by size.