![]() ![]() The down fill enables the Cosmic 20 to pack down smaller than synthetic counterparts, so amongst budget backpacking sleeping bags, the Cosmic 20 keeps up with the pack on backpacking packing. Although this sleeping bag is probably not warm enough for the dead of winter, it is versatile enough to use almost all-year round. This shows the WM has 1.24 times the loft of the Kelty. The Kelty Cosmic 20 sleeping bag is rated for three-seasons, which means it is intended to be warm enough for spring, summer, and fall, when nighttime temperatures can drop below freezing in some regions. Kelty 550 cubic inches per ounce x 20 ounces 11,000 cubic inches of down. This mummy-style bag boasts toasty 600 fill power DriDown Insulation to keep you warm. To compare the loft of the bags, a useful calculation is to multiply the fill rating by the fill amount: WM 850 cubic inches per ounce x 16 ounces 13,600 cubic inches of down. While this is a very reasonable size for a budget sleeping bag, it’s roughly 2L smaller than the comparably priced Marmot Trestles 30. Stay cozy in inclement weather in the Kelty Cosmic 20 Sleeping Bag. While it lacks a few features that we appreciate. At only 140, the Kelty Cosmic 20 is a prime example of budget performance it provides a spectacular balance of practical features at a reasonable price. If you opt for a third-party 15L compression sack rather than a stuff sack, the long version of the bag will compress down to just under 9L while the regular is around 8L, which is larger than other backpacking sleeping bags. The Cosmic Down 20 is a trapezoidal mummy sleeping bag with a warmth-to-weight ratio that’s hard to beat, especially at its price point. The Cosmic 20 has an included stuff sack when packed away, the bag shrinks down to 7’x13″ (18x33cm) for the small, 8″x13″ (20x33cm) for the regular, and 8″x14″ (20x36cm) for the long. That being said, the low price of the Cosmic 20 makes these weights extremely reasonable, especially when one considers the comfort that comes with it. With respect to backpacking sleeping bags, there are certainly lighter options than the Cosmic 20 the short weighs 2lb 7oz (1.1kg), the regular weighs 2lb 10oz (1.19kg), and the long weighs 2lb 15oz (1.33kg). ![]()
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