Kelty - Women's Cosmic Synthetic 20

I personally wouldn't mind a hybrid bag if it had purpose for me, however, the long term durability will not be as good. Synthetic has a lifespan while down, even if not cared for perfectly, will likely last a lifetime. I mean as long as you don't store it wet and compressed, it's hard to truly kill down. Not sure about repeated washing but I know the old Primaloft they recommended you only wash a couple of times during it's life. I've washed my beater down jackets probably 3-5 times over there lives and they still are going strong. Probably have more washes and abuse in them. Biggest thing I worry about washing down is baffle damage.

I'd look at the [Kelty Cosmic 20](https://www.rei.com/product/231267/kelty-cosmic-20-sleeping-bag-mens?sku=2312670002&store=102&CAWELAID=120217890018009653&CAGPSPN=pla&CAAGID=147758259799&CATCI=aud-830183485327:pla-2021410583250&cm_mmc=PLA_Google%7C21700000001700551_2312670002%7C2021410583250%7CBA%7C71700000074421743&gad_source=1&gclid=Cj0KCQjw7dm-BhCoARIsALFk4v-rxEXOce1pDojIDEZWkM93aGHIX8ftGRu5cd42LJb4rPbpf-LBnlAaArhqEALw_wcB&gclsrc=aw.ds). A down bag for just $149. Take 20% off and you're looking at $120. Tested comfort on Cosmic is 31 degrees. If you want something slightly warmer, the new [REI Radiant](https://www.rei.com/product/245179/rei-co-op-radiant-20-sleeping-bag) at $199 (just $159 after coupon). This has more fill, and varying sizes to choose from. Tested comfort 25. Weight almost the same, but the REI has better down, and more fill weight. The other option would be to buy a 30 degree bag, and a decent liner. I'm a big fan of liners because they not only help add a little warmth, they help keep the bag clean. There are a handful of Mountain Hardwear Bishop Pass 30 bags currently on outlet. So you could use the 20% outlet coupon there, and the 20% regular coupon on a liner. Just a thought. Pad also means a great deal. A Therm-a-Rest Neoair is going to be considerably warmer than a Z-Lite, especially if the ground is cold underneath you.

You'll save weight over a sleeping bag. But not over a 850f quilt. Depends where you are coming from. If you have a Kelty Cosmic and want to save weight and bulk, this will be (probably) great. If you have a 1000f western mountaineering with a 5D shell, probably not.

kelty cosmic down, featherstone, decathalon all make good bidget bags under 2kg

Kelty Cosmic 20 is the typical response for budget, good and light enough for most. Marmot Trestles Elite Eco 20° Sleeping Bag is a synthetic bag that's very similar in size, weight and warmth to the Kelty but might be cheaper depending on where you're located.

honestly dude, been there with the whole xl + lightweight + budget thing. from running my shop, ive seen tons of folks struggle with this exact combo you know. few solid options that wont break the bank - kelty cosmic down 20 comes in long/wide and packs down decent for the price. rei co-op trail pod 29 is another good bet, little heavier but super roomy and usually on sale. for 3 miles in nj temps, id lean toward the 30-degree range unless youre camping late fall. learned the hard way that going too warm just means ya carry extra weight for nothing lol. honestly the quilts someone mentioned are great too if youre open to trying something different. enlightened equipment makes tall/wide options and theyre game changers for bigger folks who move around at night.

I've used both the Kelty Cosmic Down 20 and the Sea to Summit Ascent series. For the price, the Kelty Cosmic is honestly hard to beat if you're on a budget. It's warm, decently light, and has held up for me after a few seasons already. The Sea to Summit is nicer overall with better materials and features, but for most backpackers starting out, the Kelty does the job nicely and won't break the bank.

My 15 year old cosmic is all down and it's a great bag for the money. I got it because I have a dog and generally the bag is going to get a bit more dirty and wet, though in practice I bring a light bivy sack if I expect to camp in the rain and I've only washed the Cosmic once in that time. Loft looks good and I am generally somewhat clothed in camp clothes in it so it's really not dirty. And the dogs aren't as dirty as I imagined

I'll probably wash mine again soon. I never store it compressed so that helps but even body oils and dirt impact loft long term. For a bag I probably paid like $100 for I'm very happy. I'm even impressed with the loft when I pack it up. I have stretched it into the winter months (around 0F/-20C) with a vapor barrier liner and a bivy sack. It's definitely a good cheap versatile bag. If I didn't mostly bikepack and backpack with my dog I'd probably shell out for something a little nicer. But the risk reward isn't high enough.

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.

I'm 5'9" and about 225lbs. I have a Kelty Cosmic 20 that I'm passing down to my kid because it's not comfortable. It always feels like it's too tight around my chest. I don't know if I lay too low inside the bag or what but It feels like I can barely fit my arms into the bag and be able to zip it up. I checked and it's a regular version and not a short or women's. I'm looking for something with a little more chest room. 3 seasons. I doubt I will ever be in freezing temps. I'm looking at the Nemo Disco 15 because my research showed that it might fit me better than others. I'm not a really big guy but I need to be able to move my arms around without feeling like I'm going to bust the zipper. Any other recommendations?

Then I'd say the new REI Radiant 20. It's a mostly down bag, but with synthetic in the footbox to accommodate sweat and if it gets wet in the night from rain (because most people stretch out and end up putting their feet against the tent wall which might have condensed). The Kelty Cosmic is a close second.

I've gone the last three years in mid September. It's my favorite time of year to go. I bring the Kelty Cosmic 20 down sleeping bag with the Klymit static V sleeping pad. The Kelty occasionally drops down to 125$ and it's perfect for that time of year. Warm days and slightly chilly nights. I think a bag rated 25-30 would be fine

A backpack of course along with a sleeping pad (insulated if going in cold), sleeping bag/quilt, tent. These are your big 4. A budget setup would be something like: Tent - Lanshan 2 or one of the Naturehike tents or featherstone granite - around $150 If you have the money I would get a Durston Xmid, it's pretty bomb proof and is around $330, amazing tent Sleeping bag - Kelty cosmic down - on sale for $135, Paria thermodown - on sale for $150 Sleeping pad - Paria recharge insulated - $100 or REI Helix backpack - Granite Gear crown 2 used to be found under $100 (I have one and paid $70 on sale), maybe the Decathlon MT100 or one of the REI coop bags. I'm not 100% sure what is considered the best budget one these days After the big guys above you will need: Cooking system - I use the Firemaple 600ml pot ($20) and a cheap amazon stove that fits the pot's cutouts but they sell their own for like $20 I think it's called the Greenpeak Water filter - I have a sawyer mini but if I got one again I'd get a platypus quickdraw on sale now for $30

I love my Kelty Cosmic Synthetic 20F

Oh, totally get what you mean about versatility, being able to open it up quilt-style is a game changer on warmer nights. I've definitely done the "foot out of the bag" dance too many times before I discovered those features, haha. Have you checked how the zippers hold up over time with the Sea to Summit? That's one thing I was a bit nervous about, but so far mine's doing fine.

Kelly cosmic down bags are amazing bang for buck. REI has generous return policies as well, so if you get into a bag you don't like, you have the option to return it for a year. More expensive bags/huge discounts don't necessarily mean they are going to fit your needs. I currently sleep in the Big Agnes Lost Ranger, which is a 3in1 sleep setup. It is a quilt and a sleeping bag, which means you can sleep with just the quilt, just the bag, or if it's cold enough you can nest the sleeping bag inside the quilt. It's on the more expensive side, but it could be beneficial looking into a similar setup. I would however recommend investing in a nice sleeping pad that has a decent R value. I currently sleep on the Big Agnes Rapide SL Insulated (regular) and I LOVE IT. it comes in all different types of widths and lengths. I've slept on it for 2+ weeks in the Yosemite side country and I've never had a single issue with it. long story short, i'm a huge fan of the Kelty Cosmic Down line. there are also a few REI branded bags that may be worth looking at.

I just looked at the Disco at REI and I was tempted to buy it, but I am happy with my Kelty Cosmic 20 so far. The disco was heavier but was very comfortable, and a almost double what I paid for my Kelty. I think you will like the Disco

I just used the Kelty Cosmic long for the first time this past weekend and it was great. Got down to about 30F and didn't even realize my pad had deflated until morning. Had to shed a bottom later because my legs got too warm and slept in underwear. https://www.kelty.com/cosmic-down-20/?gad_source=1&gclid=EAIaIQobChMInfnh1KqXjAMV3xWtBh3cbhL1EAQYAiABEgJzwPD_BwE

I don't have a lot of experience with other sleeping bags except the cheap Coleman ones but I love my Kelty Cosmic down 20. I go once a year to the bwca. Usually early June or mid September. It packs down super small with a compression sack and weighs nothing. Apparently it's more of a budget down bag but it's been great for me. It also drops down to 130$ a couple times a year

Push your budget a bit and get a Kelty Cosmic Down 20 on sale for about $120. It's been the best value backpacking bag for years. It has a reputation for not being comfortable at 20° but you will survive if it gets that low. If you're sharing a tent or sleep warm, you'll probably be fairly comfortable if it's that cold. You could save a little and get the synthetic version, but I don't have experience with it and personally prefer down for packability.

2nd the Kelty cosmic, it was my first bag and been a lot of my friends as well. It's not the best bag by any means, but for the money it's the best I know of unless you can find something used or super on sale