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Kelty Cosmic Down +20 Sleeping Bag

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From a late spring frost to a brisk fall night, the Kelty Cosmic Down +20° sleeping bag provides exceptional warmth at a great price.

  • Soft, high-loft 550-fill-power down insulation provides exceptional warmth and light weight
  • Slant baffle construction with differential cut eliminates cold spots; inner layer is cut smaller than the outer layer to create consistent thickness of insulation
  • Ground-level side seam keeps draft tube in place, further helping prevent cold air from seeping through the zipper
  • Polyester taffeta creates a smooth yet durable shell; polyester taffeta lining breathes for comfort and feels great against skin
  • Top baffle draft collar drapes comfortably over neck and shoulders, sealing out drafts
  • Cozy hood has drawcords of differing widths at head and neck for easy identification and adjustment in the dark
  • Draft tube backing 3/4-length, 2-way, locking zipper keeps cold air from seeping through
  • Internal loops provide attachment for a liner (sold separately) to increase the warmth of the bag
  • Pad loops provide attachment points to keep your sleeping bag and pad together, so you needn't worry about rolling onto the cold, hard ground (straps not included)
  • Hang loops allow easy drying and storage
  • Kelty Cosmic Down +20° sleeping bag comes with a stuff sack


Item 809427


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Kelty Cosmic Down +20 Sleeping Bag Specs
Best use
20 degrees Fahrenheit
-7 degrees Celsius
2 lbs. 12 oz. / 2 lbs. 8 oz. / 2 lbs. 3 oz.
1.2 / 1.1 / 1.0 kilograms
550-fill down
23 / 20 / 18 ounces
Polyester taffeta
78 / 72 / 66 inches
64 / 62 / 58 inches
8 x 14 inches
11.5 liter
EN lower limit (rating for men)
EN comfort (rating for women)
Temperature rating (F)
Temperature rating (C)
Weight - metric
Insulation type
Fill weight
Sleeping bag shape
Fits up to (in.)
Shoulder girth (in.)
Hip girth (in.)
Stuff sack size
Stuff sack volume

Kelty Cosmic Down +20 Sleeping Bag

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Kelty Cosmic Down +20 Sleeping Bagis rated4.5833out of5by12.
Rated5out of5byfromFor the price, this bag is a stealI bought this bag originally because I simply couldn't drop two or three hundred dollars on a down bag. I took it on a 600 mile Appalachian Trail hike. Some nights dropped well below 20 degrees, and while I was shivering on some occasions, it definitely kept me warm enough to sleep. I kept it in a dry sack, instead of the stuff sack it came with. It's well worth the price.
Date published: 2014-03-24
Rated4out of5byfromgood solid bagGood bag. Bought for my daughters, 12 and 15 y.o. Slept during 36 degree night, both said they stayed warm. Packs fairly well, the stuff sack isn't a compression but is decent size. The shell did absorb a little water that puddled in our tent (big rain, long night, ugh)
Date published: 2013-07-14
Rated5out of5byfromLove it!I bought this to take to Peru. I really loved the way it packed up and it was very warm. The color is really fun too. Overall seems like a high quality bag.
Date published: 2013-05-01
Rated5out of5byfromExcellent Bag for the $Warm, roomy, and light enough to haul around for a couple days worth of hiking. I used this bag with a liner in around 30 degree weather and was overly warm. My wife has the same bag and is a cold sleeper and was toasty as well. This is an excellent buy for the money, cheapest in its class that I have found.
Date published: 2013-03-23
Rated5out of5byfromUnbelievable Value!I haven't used this as a sleeping bag except to try it out briefly. I'm 6'2" / 200 lbs. and the long size fits me with plenty of room to spare. It's main use is as a topquilt in my bridge hammock. The 3/4 length zipper makes it ideal for use as a topquilt. The footbox remains intact to keep your feet warm and keeps the bag in place over you. The rest of the unzipped bag spreads out very wide and provides more than enough coverage for a hammock. I was concerned when I first used it because I could see voids in the down fill when the sun shown through it. However, that did not seem to affect it's ability to keep me warm. I've only used it to the low 30's, but stayed plenty warm. I see no reason why it wouldn't be bearable (that's what a rating is) to 20 degrees. It's not the lightest bag around. Mine weighs 46.9 oz. with the stuff sack, but at the price they're going for I'm not going to complain. It comes with a pretty small stuff sack (11 Liters?) but I'm sure it would compress down to 2/3 that volume in a compression sack. Overall, I'm extremely satisfied with this purchase.
Date published: 2013-02-06
Rated5out of5byfromGreat BagI received this bag as a present. I turned off the heat in my apartment one night to try it out and I was comfortable the whole night even when it dropped into the high 30s. I look forward to taking this bag outside and trying lower temperatures.
Date published: 2013-01-31
Rated5out of5byfromLove itI chose this bag because we are doing 4 days in Big Bend this spring. Since we will be packing 3 gallons of water per person weight is essential. This bag is confortable, super light weight and packs small.
Date published: 2013-01-30
Rated3out of5byfromHeavier than listedMy main purpose for this review is to warn you about the weight. I purchased the long which is listed on multiple sites including the brand's own site as "2 lb. 12 oz." This is inaccurate. The bag is exactly 4 lbs. This is the primary reason for the lower rating. It is very disappointing as a consumer when measurements, weights, temperature ratings and such are inaccurate. How can they be more than a pound off?? I used multiple scales and weighing methods and every time it was 4 pounds. Now apart from that, the rest is good so far. I fit in it very well length wise and the width is pretty good though tight at the elbows. This is most likely due to me being a back sleeper as it is fine when on my side (I'm 202lbs by the way). Also, I like the draft collar, the multi-width strings for tightening the hood, and the zipper guard. The zipper guard seems to be the primary element leading to zipper snags but when kept out of the way all functions fine. I got the bag on sale and will determine whether the price and comfort benefits outweigh the extra pound+ and deception.
Date published: 2012-12-02

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