Well Knitting Mens Extra Warm Comfortable Thick Winter Working Brushed Thermal Slipper Socks 1% elastane Extra warm for the coldest winter weather; Padded comfort; great for sports, hiking, skiing; 7x warmer than cotton; softer than wool, non-itchy Heavily brushed fuzzy lining soft comfort for feet; Ribbed stay-up top keeps socks from sliding down; Thick thermal yarn; Moisture wicking for dryness; Perfect indoor trail cold weather gear; Also great for indoor athletic activities Machine wash cold with like colors, tumble dry low; Made in China; 91% Acrylic, 5% Nylon, 3% Polyester, 1% Elastane Large: Fit USA Men's Shoe Size:10-13 (3) Pairs Thermal Insulated Thick Socks by Arctic Extreme for men or women. Color is : Black,Dark Grey