Injinji Performance Original Ecomade Mini-Crew Sock, Rust Rainbow merino-wool 58% NuWool (compact spun Merino) 38% Nylon 4% Lycra Offers an ultra-thin fit providing the thinnest possible interface between one's foot and their shoe. The Lightweight is the best sock to complement any minimilist footwear. Machine wash on warm or hand wash your toesocks after each use, and line dry. Do not machine dry or dry clean your toesocks. China