The Wool Ragg Crew uses a ragg yarn twisting technique, knitting together one dyed and one undyed yarn to achieve a marled appearance. This is a mid-weight wool sock with a relaxed fit that can be worn all year long. 59% Wool, 26% Recover ® Upcycled Cotton, 7% Polyester, 5% Nylon, 3% LYCRA ® Spandex Sizes: Medium, 6-9 & Large 9-12 Made in USA