Neoprene inner socks.Can be used as inner socks for boots, wading shoes, climbing shoes, etc.We recommend wearing 5 toe socks made of materials other than cotton such as chemical fibers and wool.Moisture wicking and comfortable when you sweat.After use, please dry it inside out for comfort next use.Size: S 9.1 - 9.8 inches (23 - 25 cm), M 9.4 - 10.2 inches (24 - 26 cm), L 9.8 - 10.6 inches (25 - 27 cm),