The Merino Ski+ Medium Over the Calf socks are durable, stretchy and highly breathable socks for skiing the resort or the backcountry. The fully cushioned design features a blend of merino wool, nylon and elastane that's anatomically sculpted with key support zones in the ankle, Achilles, and instep. The breathe zone increases ventilation, and the seamless toe reduces bulk and prevents blisters. Inspired by nature, icebreaker harnesses the performance qualities of natural fibers to offer an alternative to clothing based on petrochemical synthetics. Merino wool is an annually renewable fiber that naturally resists odors, keeps you cool when it's hot and warm when it's not, and lets your skin breathe for comfort all day, every day.