Dry-fit & Lightweight: 8% Merino wool,17% anti-pilling acrylic,32%polyamide, 41% polyester, 2% spandex. More stretchy, compression, comfortable and practical. Size: Our over the calf thermal ski socks are available in SMALL: Fit Women Shoe Size 4-7. MEDIUM: Fit Women Shoe Size 7.5-9.5 / Men Shoe Size 6-7.5. LARGE: Fit Women Shoe Size 9.5-11.5 /Men Shoe Size 7.5-9. X-LARGE: Fit Women Shoe Size 11-13 /Men Shoe Size 9-12.These comfortable socks are designed to provide the perfect level of lightweight warmth,keeping your feet and legs warm during cold weather activities such as skiing snowboarding or ice fishing. Ture-Compression: Better Blood Circulation as strongest compression happens at the ankle, and gradually decreases moving up the leg. And Help energize legs while skiing. The high performance ski socks are made to last over many ski seasons. Merino Wool & Skin Fit:Made with merino wool blend,the ski socks are warm without being too thick to ensure they comfortably fit into your ski boots.Compression in each ski sock help the socks to fit snuggly to your feet and legs.The knee high socks stay perfectly in place and comfortable all day while skiing or snowboarding. MOISTURE WICKING: The fabric of merino wool provides superior insulation and moisture-wicking – it’s even capable of absorbing up to a third of its weight in moisture without feeling detectably wet. keeping our foot dry and at the perfect temperature for optimum comfort. 100% SATISFACTION: With our Superior Customer Service and 100% money back guarantee, we do our best to deliver an excellent customer service and your satisfaction is our top most priority. If you’re not satisfied with our ski compression socks, just return it within 30 days for a full refund. Any question, feel free to contact us and we will reach you asap.