Kelty Cosmic Ultra 20

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Overall

#9 in

Outdoor Sleeping Bags

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Sentiment score57% positive
4
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Top Pros

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Last updated: Jun 9, 2026

Reddit Reviews

Reddit Iconflobbley
8 months ago

If you can wait a bit, like November - May, you'll likely find *much* better value for money from end of season sales. If it were me and I had to buy something now for that temp range I'd probably get the Women's Kelty Cosmic Ultra 20 from steep and cheap for $150. If you're not a woman don't worry, women's just means it has more room at the hips and a bit more insulation. The Ultra version of the Kelty Cosmic has 800 FP down compared to the 550 FP for the regular version, that means it packs down more and is a bit lighter. If you sleep colder consider the Sierra Designs Mobile Mummy 15 from Kaviso for $150. This is the bag I use in the winter and I love it, IMO it sleeps a good bit warmer than it's comfort rating and the ability to use your arms or walk around without getting out of the sleeping bag is incredible for cold weather camping. Here's a video of a guy testing this bag out in 23 deg weather. https://www.youtube.com/watch?v=_-EMsTBMVKg

3 months ago

If you can fit into a women's size bag consider the Cosmic Ultra, it's basically the same thing as the regular cosmic down but with better quality down. https://a.co/d/01ERuBBU If you actually need a 15 degree (limit) bag I can't recommend the Mobile Mummy 15 enough. I love this bag. It's currently out of stock but it comes and goes from this website. https://www.kaviso.com/products/sierra-designs-mobile-mummy-15-degree?variant=45495009935588

12 months ago

Echoing another commenter I have three "bags" as well, a winter bag, a spring/fall bag, and a lightweight summer puffy blanket that keeps me warm down to about 60. If you're in the market for a 20-deg bag I just picked this one up to replace a synthetic bag and it's pretty nice for the price. It's a higher end version of the Kelty Cosmic 20 which is often recommended as an excellent budget bag for beginners. https://www.kaviso.com/collections/sleeping-bags/products/kelty-cosmic-ultra-20-degree-sleeping-bag This guy does semi-scientific tests of sleeping bags and temperature-wise it performed nearly as well as the most expensive bag he tested. Just be aware that he complains about the cord in the hood rubbing against his nose and making it uncomfortable, but that's just him using the bag wrong, there's a puffy collar along the inside of the hood that you're supposed to pull forward to protect your face. https://youtu.be/I9VGjiH5ta0?si=Hpb3fDeHv3PyVbOq

Reddit Iconjjmcwill2003
12 months ago

You're not gonna touch a decent sleeping bag for under $70. Heck, the Kelty Cosmic Ultra 20 is considered a step above budget, it has an ISO Comfort rating of 31f, weighs 2lb2oz but cost $140-$150 You need to reset your expectations.

Reddit IconJNyogigamer
8 months ago

I bought 2 sleeping bags this year. I'm just not a quilt person. However my summer bag (37°), bought a Chinese brand Qezer on Amazon under $100. My winter down bag Kelty Ultra Cosmic 20 also on Amazon for under $160. Now I'm not suggesting these are the best or necessarily for you, but I'm satisfied with both of them and don't feel that they broke the bank. However, they are both made of down, significantly lighter than synthetic, and pack down to a reasonable size for my pack.

3 months ago

Well I don't have experience with the katabatic and haven't touched one. But I did research them and the strap system was the selling point for me along with the cost all other things comparable. I feel like the quality is great. Like I said zero buyers remorse. I was coming from a Kelty Cosmic Ultra 20 mummy bag which I felt underperformed this winter. I shaved almost a pound of gear weight and at 30 degrees F (the coldest I've had the waratah out in so far) I was much warmer than I've experienced being in the Kelty, which I would have had to pair with a fleece liner at that temperature.

8 months ago

You're likely to get all kinds of different advice, but the Kelty is a solid budget bag I think. They also have a Kelty Ultra Cosmic 20 that is 800 fill down and it packs down smaller than the regular Cosmic 20, and it's also under $200.

Reddit IconVote_Knope_2020
12 months ago

I have the single version of this and also love it. Super versatile temp-wise.

Reddit Iconkrzybone
18 days ago

Usually any self inflating sleeping pad gets the job done. Alps mountaineering outback sleeping pad is the one I use for camping. As for sleeping bags Kelty is always your best budget sleeping bags.i use a 20 down sleeping bag.

Reddit Icongorlpowr-powr
6 months ago

The RTIC 32 or 45, Igloo BMX 30 or Lifetime 28–55 (on the smaller end) all make sense for a cooler considering your space. These would hold ice for multiple days, have some decent lid seals and don’t waste internal volume the way Yeti does with overly thick walls. RTIC is probably the best among them though so that’s that! For the sleeping bag, keep it simple and three-season. Solid options - REI Co-op Trailbreak 20 or 30, Kelty Cosmic Synthetic 20 or Marmot Trestles 30. All of these pack reasonably small for a synthetic bag are warm enough for shoulder seasons and don’t feel like overkill. Other ideas? - merino wool sock gift set - gaiters for muddy or snowy trails - foot care set (creams + protective socks) - hat clip or sunglasses retainer - packable camping pillow - lightweight hammock with straps - sit pad for breaks - bug net hat - quality moisture-wicking base layers - hiking hat with sun protection - lightweight gloves for cool mornings - buff or neck gaiter And goes and on and on but this should be a good start for ya! Otherwise https://alaskanarrows.com/50-coolest-gifts-for-outdoorsmen/ for others

Reddit IconLate_Advantage
6 months ago

If he’s anti-Yeti, you’ve got some solid options in your budget that feel “real camping” and not glampy. Cooler recs (non-Yeti, actually practical) RTIC 45 or RTIC 52 * Similar performance to the expensive rotomolded brands but way less hype-tax * The “usable space” thing is real — the thick-wall premium coolers can feel small inside * Tough enough for car camping and won’t eat your whole budget Igloo BMX 52 * Kind of a sleeper cooler that’s durable and simple * Lighter and easier to deal with than the big “premium brick” coolers * Usually under budget, so you could still do another gift Sleeping bag recs (not fancy, packs down, works) Kelty Cosmic 20 (down or synthetic) * Good warmth-to-pack size ratio (important if you’re camping out of an Altima) * Not some luxury “cabin comfort” bag — just a solid all-arounder * 20° is a nice versatile rating unless you’re only camping in warm summer nights REI Trailbreak 20 * More basic and a bit bulkier, but reliable and straightforward * Good option if he’s rough on gear and you want “buy once, don’t think about it” Cooking gear upgrade ideas (useful + not glamping) Jetboil Flash (fast + easy, great for coffee and quick meals) or MSR PocketRocket Deluxe (more minimalist/no-nonsense, packs tiny) Also a GSI cook set (Pinnacle or Bugaboo) is a great “upgrade the whole kitchen” gift that doesn’t take a ton of space and nests well. If I had to pick the cleanest combo: RTIC 45 + Kelty Cosmic 20 Both feel practical, not influencer-y, and should fit the sedan-camping reality.

Reddit IconYourCaptainSpeaking_
3 months ago

I use a synthetic bag (20° Kelty Cosmic) and/or quilt (20° EE Apex) + a S2S Rector all the time and I think you’d be well served with a synthetic + fleece system. I would also look into a mega-comfy pad to put on top of the cot. Exped or Thermarest are my preferences there when weight/size doesn’t matter.

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