Darn Tough Men's Merino Wool Boot Sock Full Cushion 1405 - 2 Pair 69% Merino Wool, 27% Nylon, 4% 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. Includes 2 Pairs Performance fit Full Cushion No slipping, no bunching, and no blisters Fine gauge Merino Wool