These are USA made, machine knitted socks in a great heavy weight feel. If you are snowmobiling, snowshoeing, skiing or just shoveling snow, these will keep you feet warm, no doubt. We have even used them hiking in the Grand Canyon as alpaca naturally wicks away moisture and are antimicrobial, so no "stinkies". Three colors available: grey, heather brown and black. The material in these socks are 44% American grown alpaca, 44% microfiber. 10% nylon, 3%lycra support. Washing Care: Machine wash in room temp water with gentle laundry soap (or better yet, mild hair shampoo) and tumble dry low. Better yet, air dry for longer life.