'Bootgear' CoolMax Hiker 20% nylon Content: 70% Coolmax, 20% Nylon, 5% Nylon, 5% Lycra Spandex Coolmax- DuPont's unique four channel fiber for a total moisture management Laceguard-ProtectGuard - Double layer of yarn to provide wear resistance NWS (Natural Wicking System) - Exclusive AirVent system which allows the natural removal of heat and moisture from the foot, to the outside of the sock Anti-Microbial-ProtectGuard - Inhibits growth of bacteria and fungi