FEATURES of the Darn Tough Men's Edge Midweight Padded Cushion SockPerformance Fit: No slipping, no bunching and no blistersFine Gauge Knitting: Unprecedented durability and the unique "put it on, forget it's on" feelFast Action Wicking: Pulls moisture away from skinAll Weather Performance: Cool in the summer, warm in the winterNaturally Antimicrobial: Repels bacteria and odorGuaranteed For Life: No strings no conditions for lifeMerino Wool: Ultimate fiber for breathability and comfort in all conditionsTrue Seamless: Undetectable seam fusion for an ultra smooth, invisible feelCushion: Mid-level cushion density under foot, A warm and ultra-comfortable choice when conditions demand itOver The Calf Height: Name says it all, ultimate height for keeping the outsideGoutFabric Details54% Merino Wool, 43% Nylon, 3% Lycra Spandex Products on Sale are Discontinued Styles or Colors.