The Darn Tough Men's Over The Calf Function 5 Padded Cushion Ski Sock adds a new level of comfort to your days on the mountain. Strategic cushioning zones are placed at five areas where ski boots make the most contact, as well as providing extra cushioning at the Achilles and ankle. Soft, breathable and anti microbial merino wool cushions your foot while moving sweat away so your foot stays comfortable and your feet air out quickly after you pull your boots off for the day. Nylon fibers improve durability and Lycra adds stretch so the sock conforms to your foot for an optimal fit. Seamless construction keeps chafing and blisters away.