When conserving weight and space in your backpack is important, the Mountain Hardwear Phantom Sleeping Bag has you covered. Lightweight and compact, the Phantom is easy to bring along on your next weekend backpacking trip. Its high quality 850-fill down keeps you warm and comfortable while the performance mummy shape contains this warmth while keeping the weight of the sleeping bag low. The down insulation is also highly compressible and the included compression sack makes it easy to pack the bag away in your pack for your next backcountry adventure in mild weather.