FootSmart Men's CoolMax Firm Support Over-the-Calf Padded Socks 26% nylon Graduated support applies pressure at the ankle, slowly decreasing it up the leg, stimulating circulation. Coolmax polyester fiber draws moisture away from the foot. Graduated Support Level: Firm 20-25mm / Hg. 65% Coolmax polyester, 26% nylon, 9% spandex. Note: Light to moderate support products are recommended for first-time wearers. Made in USA. Care: Machine wash on gentle cycle. Lay flat to dry.