Casual or dressy, you can't go wrong with a 3 Pair Pack of Women's Muk Luks Crew Socks. This sock pack is a multi pack of different colored socks and is made of 88% Polyester Microfiber, 11% Nylon, and 1% Spandex. This sock pack is available in one size fits most and should be machine washed on gentle cycle, no bleach, and lay flat to dry. Made in China. Material: Polyester, Nylon, Spandex.