Kelty Cosmic Synthetic Fill 0 Degree Backpacking Sleeping Bag, Regular – Compression Straps, Stuff Sack Included
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Size: Regular
Features
- Taffeta
- Imported
- 0 Degree Temp Rating, Regular Size: Fits sleepers up to 6ft, fill weight 55oz, total weight 4lbs 6oz, stuff size (non-compressed) 17x11 inches. Color: Fired Brick Red/Smoke
- Packability: Integrated compression stuff sack, coupled with the premium packability of the synthetic fill allow the Cosmic synthetic to reach minimalist standards of backpacking gear. Trail weight varies by temp rating, from 2lbs 6oz to 4lbs 11oz.
- Insulation: Cirroloft synthetic insulation provides reliable warmth in cold and damp conditions, maintains loft for even coverage with no cold spots. Temperature ratings from 0 degrees to 40 degrees, to ensure your time on the trail is comfortable.
- Tailored Fit: Natural fit spacious footbox gives more room to wiggle your toes, and length options range to fit sleepers 58 to 66. A handy stash pocket on the exterior of the bag for your overnight goodies and essentials in the tent.
- Kelty Craftsmanship: Kelty is synonymous with quality in the outdoor community. Kelty gear is built for play, and built to last. The Cosmic Synthetic bag is ready to be put through the ringer on the trail, campground, and everywhere in between.
Brand: Kelty
Color: Red
Occupancy: 1 Person
Shape: Mummy
Seasons: 3 Seasons
Age Range (Description): Adult
Sport: Camping & Hiking
Special Feature: Lightweight
Material: Blend
Fill Material: Synthetic
Brand: Kelty
Color: Red
Occupancy: 1 Person
Shape: Mummy
Seasons: 3 Seasons
Age Range (Description): Adult
Sport: Camping & Hiking
Special Feature: Lightweight
Material: Blend
Fill Material: Synthetic
Product Dimensions: 204"L x 132"W
Item Weight: 1700 Grams
Outer Material: Nylon
Fabric Type: Taffeta
Size: Regular
UPC: 727880864651
Item Package Dimensions L x W x H: 17.5 x 11.6 x 11 inches
Package Weight: 2.25 Kilograms
Item Dimensions LxWxH: 9.7 x 8.6 x 15.7 inches
Brand Name: Kelty
Warranty Description: Limited
Model Name: Cosmic
Suggested Users: mens
Number of Items: 1
Manufacturer: Kelty
Part Number: 35428520RR
Model Year: 2020
Style: Regular
Included Components: Sleeping Bag, Stuff Sack
Fill Material Type: Synthetic
Date First Available: December 12, 2019
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Top Amazon Reviews
Size: Regular
One bone-chilling night, I decided that I had frozen one too many times whilst camping. Upon returning home, I immediately purchased this sleeping bag. I like this bag for a couple reasons, but it may not be the ideal sleeping bag for all occasions. Firstly, the price is decent for a zero degree rating and the bag feels and looks quality. However, because it is synthetic fill and zero degree, it is quite bulky; despite the compression sack, I managed to only get it down to the size of a small baby elephant. Just kidding, but just remember that it won't be a super compact bag. To me, from the far north, the trade off between being heavier and having warmer nights is a worthy one. Lastly, I would always place this bag on a quality mat, because otherwise the insulation will compress against the earth and be rendered near useless. (the insulation, not the earth). If you're looking for a solid, warm sleeping bag without paying the small fortune required to get a down sleeping bag of any type, than this may be a notable option.
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Reviewed in the United States on August 10, 2023 by Jared Yoder
Size: Long
Sooo...I already have the little brother of this bag...the regular length 40 degree, and it is awesome for warmer weather, but a little short for me, so, for the colder winter temps, I went for more insulation, and length. This bag is Rockin !! For a zero degree bag..it has decent backpacking weight. What I really like about this run of Kelty bags, is that they don't have that annoying velcro tag at the top of the zipper, that seems to catch on everything and annoy me when trying to sleep. Very, very comfortable. Not much else to say....must experience for yourself...
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Reviewed in the United States on December 28, 2022 by blackhorseveteran
Size: Regular
Quite warm down to 20, works well for canoe camping, but it is bulkier than I expected (and I expected) wouldn't consider backpacking with it, but fine for car/canoe/sled trips
Reviewed in the United States on December 22, 2023 by Alex
Size: Long
Yes, yes, yes! Finally found a really warm sleeping bag! 1. The first thing to know about sleeping bags is cotton vs. synthetic vs. down. Cotton is dirt cheap, but very heavy, and not effective when wet. They should only be used at the campsite. Down is the most expensive, packs down small, is very light, but hard to clean, can irritate allergies, aren’t vegan (if that matters to you), and not effective when wet. Synthetic bags are the best compromise, as their cost is in the middle, they are still effective when wet, and not too heavy. This is a synthetic bag. 2. The second thing to know about sleeping bags is that the number in the title means little. What you want to know is the actual comfort temperature. For the Kelty Cosmic Synthetic 0, per their website, it’s 18 degrees. This is excellent, as for many zero degree sleeping bags, you will survive at zero degrees, but you won’t be comfortable unless the temperature is in the thirties or higher. 3. The third thing to know about sleeping bags is there is an ISO 23537 (previously EN 13537) standardized test that will verify the true capability of the sleeping bag, instead of relying on guesses from the manufacturer. Kelty has had this sleeping bag tested to come up with that 18 degree comfort temperature. 4. The fourth thing to know about sleeping bags is those ISO/EN tests are assuming that a) you are wearing long underwear and socks, and b) you are on an INSULATED pad that is rated at R-4.8 or higher (the same rating measurement standard as the insulation in your house). Otherwise, the cold ground will just suck the heat off of you. My pad is rated at R-4.5, so in the ballpark. 5. I have only tested this bag at 40 degrees so far, but it’s much warmer than my other “zero” degree sleeping bags. I took my balaclava off for the whole night and didn’t cinch the bag around my face. I’ve never done that before with my other bags at that temperature. The baffles around the neck and zipper work well. 6. A big factor in its effectiveness is it does a really good job puffing up, as air is the primary insulator in sleeping bags. It really fights me when I’m trying to get it back in its stuff sack. That’s a good thing. When I’m storing it in a black garbage bag (recommended for long term storage, or hanging them vertically), it easily fills the whole bag. 7. This will fit in a 55 liter backpack when in the stuff sack, but just barely, and will take up half of the available space. I also have to put it in vertically, and just push it down once it’s in. You can also not use the stuff sack and just shove it down there inside a compactor bag. Any synthetic sleeping bag takes up substantial space, but this takes up more space than my other sleeping bags. 8. I got the long version, and weighed it at 4.95 pounds, just about right on the mark of the advertised weight of 5.0 pounds, and that includes the 4-ounce stuff sack. I’ve had bags be substantially lighter, which makes me question their quality control. 9. The stuff sack feels flimsier than other stuff sacks, but it is also a few ounces lighter than my other stuff sacks. It comes with a cap, which doesn’t make the sack waterproof, but definitely more water resistant, as my other stuff sacks just have a flap at most to try to cover the hole that isn’t very effective. 10. There are straps sewn along the zipper to keep it catching on the bag. The zipper works well until it gets up to my bicep, and then I have trouble zipping it the rest of the way. It’s an art to try to get it to zip the rest of the way, which involves two hands. This is the only negative I can think about this bag. It doesn’t have Velcro to keep the zipper from coming undone. It was unzipped a few inches when I woke up. I was warm, so maybe I pulled the opening up a little bit to cool off, I dunno. 11. The zipper stops just a few feet from the bottom of the bag. I don’t know why the manufacturer’s pictures show it only unzipped at the elbow. You can use the bag as a blanket, with a little foot hole, like most other mummy bags. 12. I’m 5’11” and 200 pounds, and I was comfortable in this long version, with adequate footspace. My arms were able to rest alongside my body with no issues. I was able to turn without having to take the bag with me. 13. There is a small zippered pocket near your head that can barely hold an iPhone 7, but I just use it for a headlamp. I like that it’s zippered, because I’ve had items fall out of Velcroed pockets. You should stash your electronics (phone, headlamp, GPS, pad inflator, battery backup, etc.) in your bag because cold weather will zap the charge, so you can throw the rest in your footwell. Stash your water filter, too, because if it freezes with water particles in it, it will be ruined. 14. If you want to save weight with the same comfort temperature rating, you can get their down Cosmic Ultra 0 and save ten ounces for an additional $240. So yeah, this is a good deal. 15. Overall, this is a heavy sleeping bag, so it’s best as a winter-only bag, but I was so impressed with it, I ordered their 40-degree synthetic bag the next day, which has a comfort temperature of 37 degrees, but weighs only 2.36 pounds for the standard length. However, the standard size ended up being too restricting for me width-wise, so I'm glad I got the long version for this.
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Reviewed in the United States on February 11, 2024 by TitleWriter
Size: Regular
My son used this sleeping bag for his first "cold weather" camping trip with Boy Scouts. It kept him warm and cozy. This is meant for an adult and he is still kid-sized and it still worked well for him.
Reviewed in the United States on March 27, 2024 by ophelia528
Size: Long
Incredibly warm and comfortable in 20 degree weather. And it unzips from the bottom for temp control. Great investment.
Reviewed in the United States on October 20, 2023 by Kevan Thoman
Size: Regular
Sleeping bag is bulky so don’t recommend it for backpacking but for regular camping and amazing for the price. I love kelty products.
Reviewed in the United States on March 23, 2024 by Goose
Size: Regular
Decent value. Bag is not compact. Used in 34 degree weather and not horrible but not completely warm either. Slept with multiple layers of clothing and fleece jacket. The bag itself is comfortable and is great for car camping when temps don’t get below 40.
Reviewed in the United States on March 12, 2021 by John McDermott