18% nylonPREMIUM QUALITY BLEND – Only using the highest quality yarns, our lightweight wool socks contain 81% Merino Wool, 18% Nylon, and 1% LYCRA Spandex. Made in the USA.DESIGNED FOR COMFORT – Our hiking socks are made to maximize comfort and fit, each sock is wool cushioned from top to toe, has LYCRA spandex for a great fit and reinforced toe to ensure long lasting use. Also machine washable and dryer safe but air dry is recommended.GREAT FOR THE OUTDOORS – These lightweight hiking socks are excellent for both men and women whether you are hiking, trekking, running or walking for everyday life. Our classic Ballston sock contains soft itch-free merino wool which helps regulate your skin temperature during summer, spring, autumn and winter.NATURAL WICKING & REDUCES ODOR – Merino wool’s natural properties make it wicking, anti-bacterial and odor resistant during hot or cold weather. Naturally wicks away sweat which quickly evaporates to leave you comfortably dry.100% MONEY-BACK GUARANTEE – We proudly stand behind the comfort and quality of our merino socks and our use of minimal and environmentally friendly packaging. If for any reason you’re not satisfied with your purchase, contact us for a full refund. It’s part of the Ballston Promise. Try us RISK FREE TODAY, CLICK ADD TO CART NOW.