Darn Tough Men's Merino Wool No Show Mesh 1437 - 3 Pack 71% Merino Wool, 27% Nylon, 2% Lycra Spandex To help ensure many happy miles with your Darn Tough Vermont socks we recommend that you machine wash them in warm water on gentle cycle with socks in-side out. Do not bleach. Tumble dry on low. Do not dry clean. 3 Pair Included Ultra-Light No slipping, no bunching, no blisters Holds 14 ounces of liquidFast drying and breathable Repels bacteria and odor