61% Coolmax Polyester/29% Polyester/9% Nylon/2% Lycra Spandex. Made in US. Stability Fit built in for enhanced arch support. Coolmax moisture management technology quickly moves sweat to keep feet dry and comfortable. Materials: 62% Coolmax Polyester, 26% Polyester, 10% Nylon, 2% Lycra Spandex. 2 pairs per package. Reinforced heel and toe for extra durability and protection.