Kelty

Women's Cosmic Synthetic 20

Kelty Women's Cosmic Synthetic 20

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Overall

#12 in

Outdoor Sleeping Bags

according to Reddit Icon Reddit

Sentiment score50% positive
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Last updated: May 7, 2026

Reddit Reviews

Reddit IconEquivalent_Chipmunk
3 months ago

All of these suggestions are really junky except maybe the mat though. It's not like you couldn't go backpacking with them, but you could go much lighter without paying that much more. Borah bug bivy + 7x9 tarp: $184, ~15oz 3FUL Qidian Pro pack: $92, ~31oz CCF pad, whatever is cheapest around R2: ~$30 Ice flame quilt: $100-200 depending on rating You'll be out the door around $400-500 for the big 3, with a weight that should be well under 5 lbs, and nothing that you'll end up with zero use for later once you upgrade a bit.

3 months ago

Yeah I agree with you on the tent, it's a lot more comfy for most beginners. The 1/8" ground sheet is a solid idea too, though I do also think the eggcrate CCF pads are also great in combination with an inflatable, since they provide a more comprehensive backup in the case of inflation failure, and they also function as a sit/kneeling pad. Tons of ways you could go as a beginner. The right idea is to buy stuff which won't immediately become obsolete once you decide to throw a bit more money at the hobby.

Reddit IconJolly-Slow1164
3 months ago

I agree that these are reasonable suggestions, and that a Kelty sleeping bag, let alone an Ozark trail tent, is not. Though for a novice (who hasn't expressed interest in UL) I would probably guide them to an actual tent, like something in the lanshan series. Or a SMD gatewood Cape if she/he may go in the ultralight direction I'd also suggest going in the multi-use direction from the start. Get a 1/8" foam pad and one of it's many uses is under the tent as a ground sheet. Then a light/cheap inflatable pad (https://www.amazon.com/Sleepingo-Camping-Sleeping-Pad-Backpacking/dp/B07FP4Z3RZ/) inside the tent on top of it will round out the comfort/warmth equation for about the same price (later, when the ul bug strikes, you can cut down the inflatable to torso length, weld it shut with a clothes iron, and use your pack under your feet) But this is more preference than right/wrong compared to your list

Reddit IconJurnigan
3 months ago

You can absolutely piece together a Big 3 set for around $300 or less that'll be totally fine for shorter hikes in good weather. It's still worth avoiding no-name brands when you can, but here's a quick sketch of one: Kelty 20⁰ synthetic bag: $80, 3lbs 2oz ALPS CCF mat: $30, 10oz Ozark Trail 1p tent: $80, 4.1lbs REI Trailmade 60 pack: $125, 3lbs 6 oz This is already over 10lbs with just these items, so it's not exactly ultralight. However, this plus a cheap stove/pot setup, headlamp, and some items from around the house, and you're a good chunk of the way to a complete kit. The price skyrockets pretty rapidly once you start wanting to shave ounces, get more compressible insulation, or survive more extreme conditions. That's why mid-tier and top-of-the-line gear is so pricey, it's functionality at a lighter weight (plus relative lack of demand for expensive UL gear) that drives it up. If you don't know how much you'll use your gear, better to get something cheap at first, then if it wears out or you get sick of the compromises, you can always upgrade later. "Buy once, cry once" is only good advice if you already know you'll use what you're buying consistently.

Reddit IconNewMrMead
7 months ago

I love my Kelty Cosmic Synthetic 20F

Reddit IconLetMany4907
7 months ago

For casual three-season camping around 0°C, synthetic’s way easier on the wallet. Marmot Trestles or Kelty Cosmic Down alternative bags hold up fine, and you don’t freak out about melting water or sweat ruining insulation.

Reddit IconFun_With_Math
26 days ago

I don't know about temps. Just depends what you camp in. General wisdom is to get a bag rated for 10 degrees lower than expected, but Scouts can supplement with more layers in the winter. There is a bit of science and experience needed for that though. I do not recommend 2 bags. A winter bag works just fine in the summer. Just unzip it or just use a blanket if it'll be warm. For any bag, be sure to check the ISO Tested Comfort Rating. - Product names and descriptions are often misleading, even for the big name trusted brands. Kelty didn't provide their ISO Test rating on thier website but they did in response to my email to customer service. - Amazon bags are often unrated so I wouldn't trust them. Bags go on sale a lot. The best bag is often whatever is on sale. I bought bags for me and my kids at the REI outlet website. Hikerdirect.com for Scouts has good bags at good prices. Much of it is Alps Mountaineering, which is a good brand. The Kelty Cosmic line is often recommended as another good budget brand. Coleman still makes good stuff, finding the ratings can be a challenge though. I wouldn't trust anything but a known good brand (that is ISO rated) for winter. A scout won't know if they have a bad bag, they'll just hate cold camping and won't want to go again. Also, the sleeping pad definitely matters for cold weather.

End of reviews

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