These socks are our best sellers, and once you see for yourself, you will understand why. The Merino Ski and Snowboard Sock will be the perfect sock when you are hitting the slopes all day long. It is thin enough to feel comfortable in your boot while the thermal properties of the Merino Wool will keep your feet comfortable and warm all day long. Trekking to the peak of a mountain in the freezing cold? The Expedition Wool Mountaineer Sock will be your best friend. This sock was built to be our warmest sock for winter mountaineering and you won’t want to be caught without it!