The Darn Tough RFL Over The Calf Ultralight Socks for men. Ultra light, fast and uncompromising. This sock refuses to let a little shin bang send you inside on a powder day because we ve added just the right amount of targeted padding on the front shin area where skiers and riders often need a little more cushion. Nothing feels better than the warmth Merino Wool provides when the mercury drops. And since Merino Wool is naturally antimicrobial this sock repels bacteria and odor. From earning turns in the backcountry to buffed out groomers, this ultra light sock wants in on the action all day long. Still made in Vermont. Guaranteed for life. Features: 64% Merino Wool, 33% Nylon, 3% LycraR Spandex Sock Care: To help ensure 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.