FootSmart Men's Cotton / Nylon Moderate Support Over-the-Calf Socks Cotton / nylon blend offers breathable comfort with exceptional durability. Graduated support begins at the ankle, stimulating circulation to reduce swelling and aching. Graduated Support Level: Moderate 15-20mm / Hg at ankle. 56% nylon, 32% cotton, 12% 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.