Hot Headz Polarex Fleece Socks MATERIALS: 96% Polyester, 4% Spandex; imported VERSATILE: Wear with any type of shoe STAY TOASTY WARM ON CHILLY DAYS: Extreme warmth, cozy comfort STAY DRY: Wicks moisture away from feet SIZES: Mens Sizes-Small: up to 8.5, Medium: 9-10.5, Large: 11-12, X-Large: 12.5+; Ladies Sizes-Small: up to 9, Medium: 9.5-11.5, Large: 12+