Extreme Alpaca Slipper Socks 10-13 (Fit Men's Shoe 8-9 or Ladies' Shoe 9-11) 2% elastic This is the original Extreme Alpaca tm Sock! Produced entirely in North America of North American Alpaca Fiber! Alpaca's natural wicking ability will keep feet warm & dry ** SOCK size fits ladie's shoe size 10-12 or men's shoe size 9-10 Now with reinforced heel and toe