80% Superwash Merino, 20% Nylon because who wants to hand wash socks? Especially made for socks in fun colors that surprise and delight and some even stripe! Sock weight. 460 yards/100grams Knit: US size 2 28-30st over 4 inches. Crochet: C hook Machine wash cold, gentle or hand wash. Do not wring. Tumble dry low.