Icebreaker SKI+ULTRALIGHT OTC ski socks are a result of super comfortable articulated cut combined with warm and durable merino wool mix. They are designed without padding for a whole-day hike in the mountains during warmer months. Ski+ construction includes support zones at the ankle and Achilles heel for easier manipulation and stable fit. Breathable zones in the front of the foot ensure improved ventilation. Seamless toes help prevent blisters during many Ski mountaineering adventures.