The Mountain Equipment Helium 800 is a warm and relatively lightweight down sleeping bag for a variety of activities. Thanks to its small pack size and low weight, the bag should fit in any rucksack. It is perfect for backpacking and trekking in cold but dry conditions. Whether you're staying in unheated tea-houses in the Himalayas or winter rooms in the Alps, this warm, yet lightweight sleeping bag is ideal. Thanks to the snug alpine fit, the sleeping bag is extremely thermally efficient and light. Plus, it's so comfortable to sleep in. The 4 baffle anatomically shaped footbox is also very warm and spacious. In addition, the sleeping bag is equipped with an integrated collar with a Lode Lock closure, which is easy to open and close and efficiently retains warmth. Of course, the sleeping bag is filled with pure duck down. For the outer shell, Mountain Equipment used very light and compressible Helium 20 fabric. This material is not only windproof and downproof but also tough and breathable. Of course, the Mountain Equipment Helium 800 down sleeping bag comes with a waterproof stuff sack to keep it dry as well as a cube for storing the bag between tours. With the Mountain Equipment Helium 800 down sleeping bag, you'll be perfectly equipped for your next outdoor adventure.