Back to top

Please select a color/size.


  • Ripsop polyester creates a smooth yet durable shell; polyester taffeta lining breathes for comfort and feels great against skin
  • 600-fill-power DriDown has a water-resistant finish that allows down insulation to resist moisture, dry fast and maintain loft
  • 60 in. dual-slider locking zipper with antisnag design and draft tube to hold in warmth
  • Thermal comfort hood has drawcords of differing widths at head and neck for easy identification and adjustment in the dark
  • Full draft collar drapes comfortably over neck and shoulders, sealing out drafts
  • Quilt-through construction provides maximum warmth without cold spots
  • Natural-fit footbox provides plenty of room so feet don't feel scrunched
  • Stuff sack included


Many sleeping bags are rated for temperature by an independent testing protocol, the European Norm (EN) 13537. Each bag gets two ratings: a Comfort rating and Lower Limit rating. The Comfort rating is the lowest temperature at which the bag will keep the average woman (or "cold sleeper") comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep an average man (or "warm sleeper") comfortable. Everyone's body and sleep comfort is different, so EN Ratings are merely a guideline to help you compare products.

View all Kelty Men's Sleeping Bags

REI membership


Best Use Camping, Backpacking
EN Lower Limit 19 degrees Fahrenheit
EN Comfort 30 degrees Fahrenheit
Temperature Rating (F) 20 degrees Fahrenheit
Temperature Rating (C) -7 degrees Celsius
Long Right
3 lbs. 1.6 oz.
Regular Right
2 lbs. 12.8 oz.
Short Right
2 lbs. 9.6 oz.
Shell 50-denier ripstop polyester
Zipper Location Right
Insulation Type Down
Water-Resistant Down Yes
Fill 600-fill DriDown
Fill Weight
Long Right
1 lb. 4.9 oz. ounces
Regular Right
1 lb. 2 oz. ounces
Short Right
1 lb. 0.3 oz. ounces
Lining 50-denier polyester taffeta
Sleeping Bag Shape Mummy
Fits Up To (in.)
Long Right
78 inches
Regular Right
72 inches
Short Right
66 inches
Shoulder Girth (in.)
Long Right
64 inches
Regular Right
62 inches
Short Right
58 inches
Hip Girth (in.)
Long Right
60 inches
Regular Right
58 inches
Short Right
56 inches
Stuff Sack Size
Long Right
8 x 14 inches
Regular Right
8 x 14 inches
Short Right
8 x 13 inches
Stuff Sack Volume
Long Right
11.5 liters
Regular Right
11.5 liters
Short Right
10.7 liters
Compressed Volume
Long Right
10.4 liters
Regular Right
Unavailable liters
Short Right
8.3 liters
Gender Unisex
Rated 3 out of 5 by from Great price to weight, but sleeps cold I bought 4 of these bags for backpacking because of the great prices and positive reviews. They are very good bags in terms of construction, easy of use and packability. However, all of us sleep cold in them relative to the 20F rating. We have about 30-40 nights in them in the last 2 years. The coldest night for all of us was a windy 24F night in Death Valley in January ironically enough. All of us piled on our layers and just get warm. My wife and daughters have since added bag liners and upgraded their pads to thick Big Agnes Q-Core which has helped. Last weekend we were in mid to low 30's in the Sierras and again, we all slept cooler than we would have liked. From my experience, the "comfort" rating for women should be closer to 45F and 40F for men. We are planning a JMT trek this fall and I'm now shopping for something better for my wife and daughters. Cold nights can zap enthusiasm too quickly!
Date published: 2016-07-16
Rated 2 out of 5 by from Farmyard smell I was pleased at first with the bag, using it for firefighting camp. When I tried to wash it, following instructions carefully, the slight smell of down grew into a sickening smell which never went away. Cleaned it a number of times and aired it for days but to no avail. Reading online suggestions, I learned that the only way to prevent this farmyard stink is to buy a better quality product in which the down has been properly cleaned before the bag was made. Right now, I can't even have this bag airing in a room as it is nauseating, none-the-less put my head into it on a cold night.
Date published: 2017-01-03
Rated 5 out of 5 by from Superb performance I could afford I purchased this bag for a early spring trip on The Knobstone Trail in Southern Indiana. My previous bag didn't perform well below 40 degrees, and we were expecting night time temps as low as mid-20s. We were backpacking 50 miles in 4 days with a total elevation gain of 10,500 (yes, in Indiana...up and down and up and down, etc). Performance to mid 20s was important and I needed it to be relatively lightweight. This bag exceeded my expectations. I'm 5'8" and 200 pounds. The bag was comfortable with enough room to move while hammock camping. I also had an underquilt from another manufacturer. Zipper worked well (have to zip carefully to keep it moving but it never got all jammed up). Collar and hood adjustments worked great too. We had nights of 25, 30 and 40 degrees. Worked well in all, I just adjusted my base layers and sock choices. NOTE: It would be even more awesome if it would have come with a compression sack instead of a stuff sack, but it was small enough and I'm sure that helps keep the price down. The stuff sack and back fit in my pack fine.
Date published: 2016-04-05
Rated 4 out of 5 by from Kelty Cosmic Down 20 Review This Bag is pretty impressive so far. Slept in mid 30's in a tent. On a 1 1/2" Thermorest, with a base layer top and bottom, and a fleece on top. Woke up 2 hrs in sweating. This thing packs down amazingly well, I can get it and a small pillow in to the bottom compartment of my 55 liter pack. Excited to see how low I can go. Planning on making a fleece bag liner for it and hoping to get 5-10 more degrees. A great bag!!!
Date published: 2016-03-08
Rated 5 out of 5 by from Snow Camping I stayed very warm while camping in snow and 20 degree nights. One night in a shelter and another in a tent. very warm both nights.
Date published: 2016-04-03
Rated 4 out of 5 by from Lives up to Specs Love this bag so far. Haven't used below 35, but did its job to this level. I researched bags for months and settled on this one due to the larger shoulder and hip size. I an a side sleeper and move around a lot. My worries of feeling to confined while rolling around were not an issue at all with this bag. Only gripe is the fact it didn't come with a compression bag.
Date published: 2016-05-30
Rated 5 out of 5 by from Great bag, great dry down I have used it several times, but the most notable was when I used it up at high altitude. We camped in a location where the air and ground were a bit wet (it had been raining off and on all day). Sitting in the tent I could feel that my bag was more dry and warm vs. my boyfriend's Marmot Sawtooth that felt a little damp and cold. The bag kept me warm all night. Temps probably around 30 degrees at the coldest.
Date published: 2016-06-28
Rated 5 out of 5 by from Great bag at great price Feels and performs like more expensive bag but at a realistic price point, great for price sensitive customer looking for quality bag
Date published: 2016-04-07
  • y_2017, m_6, d_25, h_14
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_29
  • loc_en_US, sid_896029, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_rei-inc
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 15ms

Can the men's kelty cosmic down be combined with the women's kelty cosmic down? 

Asked by: Restes615
This information is incorrect. The Kelty Cosmic bag is only made with a right side zipper for both mens and women's bags. To be able to zip any sleeping bags together, you must have 1 left side and 1 right side zippered bag.
Answered by: Dean
Date published: 2017-05-21

I am 5'5 and sometimes feel claustrophobic in sleeping bags, do you recommend the short or regular?

Asked by: GabrielJ
The short bag fits up to 5'6". If you want extra space, choose the regular.
Answered by: REIservice
Date published: 2017-03-29

Your specs say the regular version weighs 2 lbs 12.8 oz. On other sites (including Kelty's website) it says the regular weights 2 lbs 9 oz. Can you confirm which is the correct weight?

Asked by: danreff
The weight listed is correct and it does match Kelty's site. We cannot speak to other retailer's listed weights.
Answered by: REIservice
Date published: 2016-11-23

I'm a side sleeper and don't like cold spots. I turn with the bag.  Does this have plenty of down on the sides and equal amounts on back side and top side?  Is is made so the down doesn't shift?

Asked by: Doug2410
The Cosmic Down 20 bag has plenty of insulation on the front and back sides. The quilted construction helps keep that insulation in place. It should keep you warm even when rolling it onto the side.
Answered by: REIservice
Date published: 2016-12-04

I'm 5'3" 105 lbs. I'm always cold. Do you suggest the short men's (I see it's lighter and packs smaller, which would be nice!) or the women's version of this bag? I'd sacrifice warmth for weight, hard to tell if the bags are much diff in warmth.

Asked by: khstrum
Most women-specific sleeping bags are constructed for women with extra insulation around the hips and the toe box. It’s likely the women’s Cosmic Down will keep you warmer.
Answered by: REIservice
Date published: 2017-05-14

I just received the mens version as a gift. My boyfriend and I always zipped together our north face bags. Is this sleeping bag compatible with any bag??

Asked by: kels95
We do not have a Kelty brand sleeping bag that will zip to your bag. Kelty made the men's and women's Cosmic sleeping bags with right hand zippers. One right and one left zipper is needed to zip the bags together.
Answered by: REIservice
Date published: 2017-06-08

What size compression sack would work best with this bag?

Asked by: Kriddle1911
We recommend a 10 or 11 liter compression sack for the Cosmic Down 20 Sleeping Bag.
Answered by: REIservice
Date published: 2016-08-15

Just bought this bag and love it. I wanted to pick up a woman's version for my girlfriend, however I just noticed that both the Men's and Women's bags are Right-side zip. Anyone know of a bag that will zip to this men's one? Ideally 20* (unisex is fine).

Asked by: dwbutler
Typically a men's bag has a left zipper, while a women's has a right. Since this Cosmic Down 20 is a right zipper, you will need to find a Kelty sleeping bag with a left zipper to mate them.
Answered by: REIservice
Date published: 2017-01-03
  • y_2017, m_6, d_24, h_22CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_12
  • loc_en_US, sid_896029, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_rei-inc
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 15ms