< Go to Sleeping Bags - Women's

Hands-on Gear Review

Kelty Cosmic Down 20 - Women's Review

Sleeping Bag for Women

Click to enlarge
Best Buy Award
Price:   Varies from $120 - $160 online  —  Compare at 3 sellers
Pros:  Inexpensive for a down bag, improved 600 fill power, 2 diameters of drawcords on chin and hood
Cons:  Heavy, less compressible than competitors
Bottom line:  A decent quality backpacking sleeping bag for an unbeatable price.
Editors' Rating:     
  • 1
  • 2
  • 3
  • 4
  • 5
Manufacturer:   Kelty


The Kelty Cosmic Down is the least expensive down bag we tested, besides the Slumberjack Boundary 20. It's a great value for a budget conscious lady looking to purchase her first mummy-style down bag for a backpacking trip. Retailing for a mere $160, it wins our Best Buy Award. The Cosmic Down has low quality 600 fill duck down that is heavier than we would have liked, though the newest iteration of this classic bag now has hydrophobic down. It is very similar to other inexpensive down bags like the Mountain Hardwear Heratio and the Big Agnes Roxy Ann 15; if you're willing to sacrifice a bit of weight and quality, you can save yourself a lot of money.

To see how the Cosmic Down compares to the rest of the sleeping bags we tested check out our Best Women's Sleeping Bag Review.

RELATED: Our complete review of sleeping bags - women's

Compare Side-by-Side

Compare all Sleeping Bags - Women's >

Analysis and Hands-on Test Findings

Review by:
Jessica Haist
Review Editor

Last Updated:
August 12, 2016
The Cosmic Down has been updated for 2016 and all the changes are for the good. In addition to being available in a new color and style, the materials and fabrics have also changed. The fill power has increased from 550 to 600 hydrophobic DriDown and the list price has decreased to $160 (from $200). The Cosmic Down is giving its competitors a run for their money.

Kelty has eliminated the very similar Women's Ignite and instead transferred over the Ignite's best qualities to the Cosmic Down.

Performance Comparison

Click to enlarge
The Kelty Cosmic Down - Women's has had a facelift this year and we like the improvements of increased fill weight!


The bag is EN tested to 25F, a significant step up from the old Cosmic that was 32F. We did not experience temperatures that cold while testing this bag, but this new 600 fill power bag feels just as lofty as the Marmot Angel Fire and we think it would do ok down to at least the 30's. The Cosmic Down is one of the few down bags in this review (along with the Angel Fire and Roxy Ann) that incorporates a draft collar to keep warm air in and cold drafts out. We think this feature adds an element of warmth, although the Cosmic's draft collar does not have draw cords to enable you to cinch it down around your neck. We discovered that this bag incorporates synthetic materials into its neck baffle and draft tube, which could potentially be because these areas are more prone to moisture; unfortunately, this also contributes to its weight and bulk.
Click to enlarge
The Kelty Cosmic Down - Women's is EN rated to 25F, don't be deceived by the number 20 in its name!

The women's version of the Cosmic Down has two ounces more down fill included, upping the warmth in a smaller package. All of the Cosmic Down models now come with water repellant treated "DriDown" fill which helps this bag retain its loft when it gets wet, better competing with synthetic budget bags like The North Face Cat's Meow.

Click to enlarge
Kelty has upgraded the Cosmic's fill for a loftier warmer bag.


The Cosmic Down is by far the heaviest of the down bags tested at almost two pounds. We were disappointed by how heavy this bag is because one of the great advantages of down is its high warmth-to-weight ratio. The Cosmic uses lower fill power down that is heavier for the amount of warmth it provides, as well as heavier synthetic fill components (we suspect are in there to cut costs), both of which add weight. It also uses a relatively heavy shell material, which makes it more durable in the long run, but again adds to its weight. A heavier bag is an unseen price you pay for a budget sleeping bag (and ounces equal pounds and pounds equal pain!). If you are looking for a great lightweight sleeping bag that doesn't break the bank, we recommend the REI Joule.


We think the latest incarnation of the Cosmic Down is quite comfortable! Kelty has upgraded their liner materials for a softer hand, and the bag feels lofty and cozy. It fit our 5'5" tester well, and she had enough room to put on additional layers without it feeling too restrictive. We think this bag would be comfortable for ladies up to 5'7 or 5'8.

Packed Size

This bag compresses relatively well because it is down, but does not compress as well as the other down bags we tested, like the REI Joule. The synthetic filled draft collar and zipper draft tubes make the bag less compressible as a whole and contribute to it's overall packed size. It comes with a small, lightweight stuff sack, but not a compression sack. We would recommend purchasing your own compression sack to keep your pack smaller. Check out our The Best Sleeping Bag Stuff Sack review to find a compression sack that works best for you.

Click to enlarge
The Cosmic Down - Women's has synthetic filled draft collar and zipper baffles, we suspect to cut costs. This increases the weight and packed size.


The Cosmic Down is a smaller and narrower version of the men's version, and as we mentioned before, has two ounces more fill to add warmth. To learn why women sleep colder and the advantages of choosing a women's specific bag, check out our How to Choose a Women's Sleeping Bag article.

Kelty has addressed the low quality zipper that caught on the material and seems to have improved this feature, adding tougher material to the side of the zipper. We like the different thicknesses of draw cords for the hood and chin baffle so it is easy to tell them apart in the dark. This bag only comes with a small stuff sack; we think every down sleeping bag should include a storage sack so that the down does not stay compressed when we're not using the bag, as compression contributes to a shorter lifespan for the bag. Otherwise, the Cosmic Down does not have any special bells and whistles, which is fine since often extra features add to the weight of the bag.

Click to enlarge
We wish the Cosmic Down had two different drawcords for the hood and chin so they were easier to operate in the dark.

Best Application

This bag is somewhat versatile. Paired with a high R-Value sleeping pad, it could be stretched from late spring to early fall use in warmer climates. The hydrophobic down allows it to be used in a slightly wider range of conditions, like in humid or rainy climates. It is heavier than the other down sleeping bags we tested, such as the Rab Neutrino 400 - Women's and we would not want to carry this with us on extended backpacking trips. This inexpensive bag works best car camping, during sleepovers, and on short backpacking trips.

Click to enlarge
The Kelty Cosmic Down wins our Best Buy Award and is a versatile bag for camping.


At $160 the price tag on this hydrophobic down bag is hard to beat. It is a great value for a budget conscious camper who wants a down sleeping bag and needs a go-to bag for all of her camping needs. The Cosmic Down has taken the Best Buy Award for it's 2016 upgrades to the fill power and made it more of a competitor to the other more expensive down bags in this review like the Mountain Hardwear Heratio and Big Agnes Roxy Ann.

During our testing period, we ran into a woman on the John Muir Trail who was using this award winner. We polled her for her opinion, and she said "so far so good, good value for the money."


We commend Kelty on the upgrades to the Cosmic Down line and think this bag is now deserving of our Best Buy Award. We think this bag is an excellent choice for someone on a budget or new to backpacking and camping. It is warm, comfortable and versatile enough to take on backpacking trips, in moist climates or just for camping out in the backyard. If you are looking to get yourself into a down bag that is lighter than any of the synthetics we tested like the Mountain Hardwear Laminina Z Flame, the Cosmic could be the right choice for you.

Other Versions

The unisex Cosmic Down comes in several different temperature ratings including the 0 Degree and 40 degree ends of the spectrum. if you're a taller woman, they could work for you since they only come in regular (6ft) or long (6'6) sizes. Kelty makes a budget line of synthetic sleeping bags called the Tru.Comfort, and a higher end line of down bags called the Women's SB 20 and 35 degree bags.

Click to enlarge
Kelty Tru.Comfort 20 - Women's
  • Cost - $119
  • EN Comfort Rating - 27*F
  • Weight - 5 lbs 4 oz
  • ThermaPro Insulation, with built-in blanket and foot vent
  • Good down sleeping bag for a budget

Click to enlarge
Kelty SB 20 - Women's
  • Cost - $370
  • EN Comfort Limit - 31*F
  • Weight - 1 lb 15 oz
  • 800 fill, 'Head 2 Toe Dri' waterproof protection
Jessica Haist

Where to Buy?

Thinking about buying some gear we've reviewed? Help OutdoorGearLab out if you do. Just click on any of the above seller links and if you make any purchase, the seller will contribute a portion of the sale to help support this site. It won't cost you anything extra, and it's a simple way to help us fund our gear reviews. Thanks!

*Most retailers free shipping offers apply only to lower 48 US states using ground/economy shipping. See retailer's website for details.

OutdoorGearLab Member Reviews

Most recent review: August 12, 2016
Summary of All Ratings

OutdoorGearLab Editors' Rating:   
  • 1
  • 2
  • 3
  • 4
  • 5
Average Customer Rating:     (0.0)
Rating Distribution
1 Total Ratings
5 star: 0%  (0)
4 star: 0%  (0)
3 star: 100%  (1)
2 star: 0%  (0)
1 star: 0%  (0)

Have you used the Kelty Cosmic Down 20 - Women's?
Don't hold back. Share your viewpoint by posting a review with your thoughts...

Write a Review on this Gear
Where's the Best Price?
Seller Price
Amazon $119.96  -  25% off!
REI $159.95
Cabelas $159.95
Compare prices at 3 sellers >

*You help support OutdoorGearLab's product testing and reviews by purchasing from our retail partners.
Helpful Buying Tips