Darn Tough Men's Hiker Boot Sock Cushion (Style 1403) Merino Wool - 6 Pack Special 64% Merino Wool, 33% Nylon, 3% Lycra Spandex Made in USA PAY FOR 5 AND GET THE 6th FOR FREE | MADE IN THE USA: Every pair of socks is knit in Northfield, Vermont - the perfect testing ground for the finest premium all weather performance socks. BOOT SOCK HEIGHT  Sits mid-calf for added protection and warmth. A sturdy companion. For a shorter sock, check out style 1466. CUSHION  Mid-level cushion density under foot. A warm and ultra-comfortable choice when conditions demand it. For a sock with more cushion, check out style 1405. COMPOSITION  Repels Bacteria and Odor. Crafted with 64% Merino Wool /33% Nylon /3% LycraSpandex. 1441 stitches per square inch provides extra cushioning, durability, and a foot hugging fit. GUARANTEED FOR LIFE  Darn Tough's famous guarantee - if these socks wear, tear, or develop holes, Darn Tough will replace them no questions asked. No strings. No conditions.