Material: Welwoos winter heated socks are made of 92% Acrylic, 7% Polyester, 1% Spandex, which have thick layers, warm brush, comfortable touching, and no itching issues. Sizes: One size fits all. The warm socks can fit different people for skiing, hiking, trekking, camping, hunting, or daily wear. Keep Feet Warmer: Designed with thick thermal brushed fleece inner, these heated warm socks can keep your feet warm for a long time in winter or in the coldest environments. Stretchy & Cushioning: The warm thermal ski socks have high stretchy fabric to keep socks stable and improve blood circulation when you are exercising outdoors. Superior full cushioning can protect your feet better and keep feet more comfortable. Best Gifts for Men & Women: The winter insulated socks are the best gift for men & women. They can be Christmas gifts, birthday gifts, Valentines Day gifts, Fathers Day gifts, Mothers Day gifts, or other holiday gifts.