This is an Extreme Thermal Sock.  Get maximum thermal retention for your feet from 68-70% Alpaca fiber surrounding your feet warm on those winter days. Available in Gray and in 5 sizes (S-XXL)

Small - Women’s 5-8  Men’s 4-7
Medium - Women’s 8-10 Men’s 7-9
Large - Women’s 10-12 Men’s 9-11
X Large - Men’s 11-14
XX Large - Men’s 14+