NATUREHIKE Ultralight Mini Envelope Sleeping Bag
Choosing a sleeping bag for alpine climbing and mountaineering is a lot like choosing a sleeping bag for backpacking, but with an added focus on warmth and water resistance.
In order to remain as light as possible and still have enough insulation to keep you warm in alpine environments, these kinds of sleeping bags will use some of the highest quality insulation available, and that can make them expensive. Their shell materials will also often feature waterproof/breathable membranes and water repellent coatings to deal with increased moisture levels.