Extreme Alpaca Socks 10-13 (Fit Men's Shoe 9-11 or Ladies' 10-12) Made in USA This is the original Extreme Alpaca tm Sock! Made in the USA! Alpaca's natural wicking ability will keep feet warm & dry * This is SOCK size - not shoe size! * Now with reinforced heel and toe Sock size 10-13 fit ladies' shoe size 10-12 or men's shoe size 9-11