91%Acrylic, 5%nylon, 3%polyester, 1%spandexImportedNO MORE COLD FEET: Arctic Extreme thick socks by Hissox are designed to work with the majority of hiking, trekking and working socks and footwear. They provide good insulation, remove excess moisture, dry quickly and create a comfortable temperature balance, so your feet will always be dry and warm. Extra warm thermal socks for men, thermal socks for women, Cold weather socks with padded comfort; Great mens ski socks, ski socks women, hiking socks women, men hiking socks.WARMER AND SOFTER: These thermal insulated socks are extremely warm for the coldest winter weather. 7X WARMER THAN COTTON SOCKS! Softer than wool, non-itchy. Heavily brushed fuzzy warm lining of our thermal socks would keep your feet warm during the whole day whether you are outdoor or indoor. The thermal socks by 5%nylon??3%polyester and 1%spandex enhance durability that reinforced heel and smooth toe seam reduces abrasion and improves comfort for longer.TWO SIZES: The insulated thermal socks comes in Two Sizes that Medium fits US Women size 7-9, Large fits US Men size 10-13. In this way, your feet will be comfortable, your toes won??t be restricted and the socks won??t keep slipping. In addition, machine wash cold with similar colors, tumble dry low, high quality socks require the proper care!MULTI-FUNCTION: Thick but lightweight socks for cold weather provides you a no worrying winter. A perfect solution for cold season. Liners perfectly work at any type of winter sports and activities. Alpine or cross-country skiing, snowboarding, snowmobiling, hiking, climbing, mountaineering, hiking, fishing, playing traditional winter games and Ideal choice for those who spend all their working day outside in the cold.IDEA SWEET WINTER SOCKS FOR GIFT GIVING: We have lovely 15 colors for men and women to match with your pants and shoes. Hissox Comfort Warm Insulated Heated Thermal Socks are perfect for your girlfriend, boyfriend, daughter, son, wife, husband as birthdays gifts, Anniversary gifts, New Year gifts and so on.