MUK LUKS' has produced Polyester Fleece-Lined socks to cure icicle feet this winter! Our MUK LUKS' Fleece Lined 2-Pair Knee High Sock Packs have a 95% Polyester 5% Spandex material and are lined with Polyester, Fleece. These socks are incredibly Warm, Comfortable on your feet and legs and can be worn casual or for a dressier outfit. Available in women?s S/M, and women?s queen/men?s L/XL in packs Black/Black, Black/Brown, and Black/Dark Grey.Machine wash in cold water with like colors, no bleach, and tumble dry low heat. Made in China.