The Smartwool Ski Day Over-the-Calf Ski Socks are a must for your longest days on the mountain or in the backcountry. These ski socks have often been called the best available on the market, and feature Smartwool's targeted technologies to increase durability and comfort, without sacrificing a shred of performance. The non-cushioned bottom, over the calf height, and slim fit all combine to create incredible all-day comfort in boots, and the merino wool blended fabric and body-mapped mesh zones provide added breathability.