― Darn Tough Vermont Merino Wool Boot Cushion Sock 67% Merino Wool, 29% Nylon, 4% Lycra® Spandex; Machine wash in warm water on gentle cycle with socks turned inside out. Do not bleach. Tumble dry on low. Do not dry clean.Custom shrink treated Merino wool holds its shape and wont shrinkReinforced heel and toe for a very long lasting sockElastic arch support helps provide endurance for your feetUnited States High density cushioning on foot bottom. Custom shrink treated Merino wool. Ribbing.... Read [...].