Warrior Alpaca Socks - Boy's Superfine Alpaca Wool Socks - Cuff-able Crew - Solid - Ribbed Our proprietary blend contains: 48Alpaca/40Acrylic/10Nylon/2Lycra(C) Machine wash cold, tumble dry on air setting (no heat) or lay flat to dry. Now children can enjoy the softness & warmth that alpaca socks offer and keep them safe with their flame retardant properties. Made from Superfine Alpaca, Lycra, and Nylon to maintain the shape and fit. This breathable composition will keep feet comfortable and never HOT - the main cause of kids taking off their socks! An easy to care for and long lasting product that will keep children's feet warm and dry, great for every day. Alpaca will keep children's feet warm in cold climates and cool in warm climates, a perfect all-season property - especially good for winter sledding. Fully machine washable and will keep shape after a tumble dry. Please use size chart image to left to determine proper sizing.