To reduce sock and foot pain during sports or daily activity. Material:78% Cotton, 20% Nylon, 2% Spandex.Sock bottom: 20CM/7.9inch ;Sock length: 18cm/7.1inch. Keep your feet cool and dry for all day long, providing much-needed breathability during all-season wear. It’s great for running,cycling,basketball,volleyball,football and many other sports. Machine wash cold. Please do not dry clean, do not bleach, do not iron and drying them.