Muk Luks is back with their Men's 3 Pair Crew Sock Packs and the colors and patterns are better than ever. These socks will form perfectly to your feet and the soft material is made of 70% Rayon, 27% Nylon, and 3% Spandex. This product is available in OSFM and should be machine washed on gentle cycle, no bleach, and laid flat to dry. Made in China. Material: Rayon, Nylon, Spandex.