30% Cotton 30% Spandex 20% Polyester 20% Nylon Imported Machine wash cold, tumble dry low. 4 Sizes covers Women’s shoes size 4 to Men’s shoes size 16, please refer to picture 3 to find the best size fits you! 2 Pairs of lightweight sweat wicking ankle running socks featuring compression arch support, breathable mesh on the top of feet. Never wash off anti stink effect and reduce foot odor significantly. Unique ankle compression provides snug fit and keeps the socks in position. It also reduces lactic acid build up and ensure fast muscle recovery. The toes area is designed based on the feet’s shape, leaving more room for each toe to avoid blister. Quick dry material wick away sweat and keep your feet dry.