The Drymax Active Duty Hot Weather Crew 3-Pair keep feet dry and help prevent blisters because they incorporate the Dual layer Drymax sweat removal system without exclusive ACTIVE DRY technology. Made for all those who serve in uniform, the Active Duty Socks are guaranteed to keep feet drier and more comfortable than any other sock. These crew-length socks come in a breathable construction and offer a classic fit. 52% polyester, 27% Drymax/Olefin, 12% elastane, 9% nylon. Machine washable. Made in the USA.