Same great construction and yarn as our Extreme Alpacatm Socks, but knit to stop above the ankle. A great indoor slipper sock! Made in USA of member fiber. Don't be fooled by recent knockoffs. This is the original Extreme Alpaca tm Sock, produced and processed entirely in North America of North American Alpaca Fiber! Highest alpaca content of any commercially produced sock available today! These heavy socks are perfect for the active outdoorsman. Alpaca's natural wicking ability will keep feet warm & dry. 74% alpaca, 24%nylon, 2% elastic The sizes are SOCK sizes not shoe sizes. Now with reinforced heel and toe. Recommend hand wash in cold water. Lay flat to dry.