Dickies Men's 3 Pack Industrial Strength Crew Socks - Big & Tall 80% Cotton / 19% polyester / 1% spandex Imported Machine wash with similar colors. only non-chlorine bleach when needed. tumble dry medium. do not iron. Black extra-reinforcement pad, reinforced in all pressure points of heel,toe and toe cap for added durability and stain resister quality Reciprocated heel and toe for superior fit and comfort