It's warmer for its weight, warmer for its volume, and can be refreshed easier. I did go with the Klymit Insulated Static V pad. The Kelty Cosmic 20 Degree Sleeping Bag has down filling and keeps you warm down to temperatures of -7 Degrees Celsius. I got my Kelty used for a very good price, so it was a good purchase as a first down bag. It's also just more a more traditional and familiar design. The Kelty Cosmic Down 40, Dimensions, and Statistics. It features soft-as-silk nylon taffeta fabric and a handy stash pocket for your headlamp. Current Stock: 729. The Cosmic Down 20 is quite light, compressible, and warm, making it a very versatile companion in almost any season, and the materials are strong enough to last for years. As the name implies, the Kelty Cosmic 20 Degree Sleeping Bag has a temperature rating of 20 degrees Fahrenheit (or -7 degrees Celsius).It is made from 50D down proof polyester, 50D polyester liner, and 600 fill power DriDown. L'isolation en duvet imperméable et une multitude de fonctions font de ce sac de couchage une superbe combinaison de valeur et de confort. With the Sine 20° DriDown™ Sleeping Bag, you get the best of both worlds of comfort and light on weight. Compressed Volume. So far I've only tested this bag in 50 degree weather. The Cosmic Down 20 sleeping bag is insulated with water-resistant DriDown™ that resists moisture, has exceptional loft and compresses down small, making it a great bag for 3-season backpacking. Women's Cosmic Synthetic 20 Kelty. The Kelty Cosmic 20 - Women's is one of the least expensive down bags in this review. Adding a cheap and light Costco down throw does the job to make it comfortable below 30 from my experience. Backpackers.com tested and reviewed the Kelty Cosmic Down 20 sleeping bag. This sleeping bag is insulated with 600-fill Drawdown. The Kelty Cosmic 40 Degree Sleeping Bag is a nice bag for its price. It features soft-as-silk nylon taffeta fabric and a handy stash pocket for your headlamp. 10.7 oz. After putting the Kelty Cosmic Down 20 Long and the Klymit KSB 20 side by side, I went with the Kelty because it it seemed more durable, wasn't significantly bigger or heavier (my girlfriend actually thought the Kelty was lighter), and had treated down. You already took into account weight, but another pretty important consideration is volume especially considering you are not in the ultralight camp. Read on to see why this budget-friendly, feature-stuffed, mummy-style sleeping bag is one we can certainly recommend for cold weather camping. I have a Kelty cosmic down 20. I slept in 40and below weather with the same bag and a sleeping pad and I was sweating. It has 550 DriDown fill, a locking zipper, full draft collar, comfort hood, foot box and zipper draft tube. For a price less than $200, the Cosmic 20 provides acceptable levels of warmth and comfort at a weight still comfortable for backpacking. My cat's meow lost its loft a couple years ago, and I graduated to an REI magma 10 (10 degree lower temp rating, half the weight, and smaller in a plain stuff sack than the cat's meow in a compression sack) and I'm never going back to a synthetic backpacking bag again. / 0.316 kg Stuffed size: 7 x 13 in / 18 x 33 cm Insulation: 600 fill power DriDown™ It's a comfortable sleeping bag that provides reasonable warmth at a size and weight that's suitable for 3-season backpacking. About a fifth of what I paid for the Cosmic Down bag. It's widely reported that the 20 degree temp rating is exaggerated, but I still anticipated being HOT in there at 40 degrees, not cold. Kelty CloudLoft® is Kelty's affordable and durable branded synthetic fill insulation. I'd like to get a warmer bag on a budget. A hundred bucks for a down bag?! 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