MICRO CREW HEIGHT: A shorter, more concise take on the traditional crew height. Peeks just above the top of a standard hiking boot. For a shorter sock, check out style 1905. For a taller sock, check out style 1403. CUSHION: Mid-level cushion density under foot. A warm and ultra-comfortable choice when conditions demand it. For a sock with less cushion, check out style 1913. COMPOSITION: Crafted with 61% Merino Wool, 36% Nylon, 3% Lycra Spandex. 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. 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.