Ski mountaineering and backcountry skiing inherently are winter sports so you'll only leave these out of your pack once to realize you've made a mistake. These compact insulated mittens are designed for high-altitude mountaineering. The Hotmit'n features 50 grams of premium down insulation for great warmth and temperature control, and the windproof membrane adds an extra layer of protection against the extreme conditions typical on the high peaks. The kit also comes with a stuff sack for packability. At only 176 grams, you wont notice them even in your tiny race pack. And trust us, you will always move faster with warm hands!