The Darn Tough Aurora Over-the-Calf Lightweight with Cushion Socks are made to keep your feet warm and comfortable while ski touring and splitboarding. This classic ski sock has a smooth, performance fit thanks to the drop needle patterning. The Merino wool sock naturally regulates temperature and moisture, keeping your feet dry and warm all day. With light cushioning on the underfoot, the Aurora socks are super stylish and comfortable.