The sleeping bag of Mountain Hardwear Phantom is very warm but very light at the same time. The sleeping bag has a 0 ° F (-18 ° C) lower limit while it weighs just 2.6 pounds (1208 g). Also, the sleeping bag packs very small (it comes with a compression bag) and thus takes up very little space in your backpack. With a fill capacity index of 850, the sleeping bag uses the cutting-edge Q.Shield down. Mountain Hardwear is the culmination of years of backcountry manufacturing with an innovative design that maximizes the synthetic fill’s insulation quality to keep you dry when the weather is cold, wet and windy.