PowerSox Men's Power-Lites 3-Pack Crew Socks with Moisture Control 71% Polyester, 19% Acrylic, 7% Nylon, 3% Spandex Imported Pull On closure Machine Wash 69% Polyester, 19% Acrylic, 9% Nylon, 3% Spandex Strike zone cushioning Moisture management Machine wash warm with like colors. only non chlorine bleach when needed. tumble dry low. China