Lycra,Merino,Nylon,Spandex,Wool Made in USA PERFORMANCE FIT – No slipping, no bunching, and no blisters. A true put it on, forget it’s on feel. MADE IN THE USA – Each and every pair is knit in Northfield, Vermont – the sock capital of the world! Our backyard is the perfect testing ground for the finest premium all weather performance socks. GUARANTEED FOR LIFE – If these socks wear, tear or develop holes, Darn Tough will replace them with no questions asked. No strings. No conditions. For life. ITCH FREE & ODOR-RESISTANT – Our fine gauge Merino Wool naturally regulates temperature and wicks moisture. Never itchy, always on. Warm in the winter. Cool in the summer. UNMATCHED DURABILITY – The high density knit means more stitches per inch, resulting in a sock that’s more comfortable and durable without the added bulk.