polyester, cotton, nylon Imported 62% Polyester/32% Cotton/4% rubber/1% Spandex/1% Nylon SUPERIOR GRAPHICS: Smooth upper sock provides a canvas for unmatched graphic design clarity and color vibrancy AMAZING COMFORT: Double cushioned soles and impact zones CUSTOM FIT: Upper and lower arch compression for superior support Small/Medium fits men's shoe size 6-8.5 and women's 7.5-9.5. Large/X-Large fits a men's 9-13 and women's 10-13. Youth size fits shoes size 2-5.5.