Cold feet? The struggle is real. For the never warm, Darn Tough Women's Thermolite® Due North Over-the-Calf Midweight Ski & Snowboard Socks are built for two purposes: warmth and longevity. The hollow, moisture-wicking fibers from 100% Recycled THERMOLITE® ECOMADE materials trap heat and insulate feet with a soft, dry layer that protects you from hot spots, holey socks, and the need for frequent visits to the lodge to thaw out. Synthetic THERMOLITE® is a vegan option that is lightweight and insulating so your feet feel good Performance Fit: no slipping, no bunching, and no blisters Fine Gauge Knitting: unprecedented durability and unique “put it on, forget it’s on” feel Fast Action Wicking: pulls moisture away from skin and fast drying All Weather Performance: cool in the summer, warm in the winter Naturally Antimicrobial: repels bacteria and odor True Seamless™: undetectable seam fusion for an ultra smooth, invisible feel Cushion: ultralight and smooth - these are the best thin socks for skiing or snowboarding Over the Calf Height: 16.25" - the ultimate height for keeping the outside - out Made in Vermont, USA Sustainability: from responsible sourcing practices to livable wages in our communities, Darn Tough Vermont® is committed to progressive, positive, growth Recommended care: to help ensure many happy miles with your Darn Tough Vermont® socks, wash them in warm water on gentle cycle with socks inside-out; do not bleach; tumble dry on low; do not dry clean Size Chart: S - fits Women's shoe sizes 4.5-7 M - fits Women's shoe sizes 7.5-9.5 L - fits Women's shoe sizes 10-11.5 Product Features: Fabric:52% Thermolite® Polyester, 45% Nylon, 3% Lycra Spandex Darn Tough Vermont Women's Thermolite Due North Over-the-Calf Midweight Ski & Snowboard Sock