Combining a super-comfortable anatomical fit with warm, durable merino fabric, our Ski+ Ultralight Over the Calf Crystalline socks are super lightweight and cushioned for milder or spring-like conditions, and designed for all-day performance on the mountain. The construction of our Ski+ socks includes support zones at the ankle, Achilles, and instep to keep the sock in place, plus a breathable zone in the forefoot for added ventilation. The seamless toe closure reduces bulk and helps prevent blisters while hiking or backcountry excursions.