Kelty - Cosmic Synthetic 0

Another vote for Kelty Cosmic Synthetic 0. I've used mine at 15°F with a Therm-a-Rest Z-lite Sol sleeping pad, and I was very comfortable. It's a great bag at a great price. 18°F comfort rating and 5°F survival rating. That's with a pad with 4.8 R-value. My pad is only 2 R-value, but it's a comfortable setup for me since I sleep hot.

How far below 0°C? I have a Kelty Cosmic Synthetic 0, which is rated for 5°F limit and 18°F comfort (-15°C and -7.78°C). It weighs about 4.5 lbs (2 kg). It doesn't pack down the smallest, but it does compress decently well. It fits in my 65L Osprey Rook quite nicely with plenty of space to spare for my tarps and layers. I've been testing it as of late, and I really like it. It's about $129.95 MSRP.

Also, the long version is rated for 6'6" height. You're one inch shy of that, so you *should* be good to go. 😊

I'm not entirely sure about that. I've been using it with a tarp setup in testing, and it's been very comfortable down to 15°F with a Therm-a-Rest Z-lite Sol sleeping pad (2 R-value) inside my tarp setup. The floor of my tarp setup is just made of a simple 6.2' by 7.2' cheap tarp, so there's no insulation from that. As far as how I layered, I just slept in the clothes I was wearing that day for convenience's sake. >Here's a list of the layers I used... Smartwool beanie Smartwool lightweight all-season quarter-zip long-sleeved shirt -> surplus waffle top Synthetic boxer briefs -> surplus waffle bottoms -> fleece-lined softshell pants Smartwool Lolo Trail full cushion socks >That's it. As you can see, I didn't have to layer heavily. I just wore my clothes for the day. There was plenty of room for me to layer up like that without reducing loft, and honestly, I could've added a fleece jacket or shell if I wanted to and still without reducing loft. I also did not overheat, and I tend to run a little hot. For reference, I'm 5'9" tall and a stocky build at 180 lbs. My chest is pretty broad, and I typically wear a large shirt (42-44") for a snug fit or an XL (44-48") for a more relaxed fit. The same goes for my layers. They're usually loose in the stomach that way, but my shoulders and chest feel better. Again, this sleeping bag and pad combo is in the testing phase for me. It's fairly new to me. So far, however, I am very pleased with the results, especially for the price. Build quality seems solid. The baffles are filled very well and evenly. I haven't noticed any spots where there's just cold, dead air. It is fairly easy to get out of. The zipper is not the best I've encountered in terms of smoothness, but it's also not at all bad quality or unusable. Overall, it's a solid bag at a great price. It's pretty easily compressed, and though not the smallest due to the synthetic fill, it is manageable in terms of packability. There is a genuine down option for a bit more money if you want a more packable system. It's pretty lightweight at just 4.5 lbs. It's warm and comfortable. I don't like to recommend things I haven't tested thoroughly, but honestly, it's worth a shot if you have cold weather coming that will allow you to test it out in person. Even if it isn't quite warm enough for your hammock uses for winter, it'll be more than enough for the shoulder seasons. I hope this has been helpful. Hit me up if you have more questions.

I picked up a Kelty cosmic down a number of years ago. Fairly basic but it was down and a decent weight.

First - are you positive you want to zip together with your partner? I did your same plan \~15 years ago. Got 2 bags and zipped them together. It was cute. At first. Then we soon became cramped / cold. We almost always preferred to be in our own bags vs. zipped together. After the novelty of zipping together wore off - it really wasn't useful. Just saying... don't spend the extra money / effort or limit your options for this feature if you don't really need it. If you still want the zip together bags - you are looking for sleeping bags that have 'left' and 'right' zippers. Buy one left and one right. At 15F nights - you want a 5F or 0F rated sleeping bag. Or a 15F bag plus a liner for the colder nights. Are you sure you want a traditional mummy bag? I personally prefer down quilts. They pack smaller and are more comfortable than my mummy bag. They also work well when 2 people are together. Snuggle under the blankets, but then go into your own cocoon for the night time. **What is your budget?** It looks like Mountain Hardware does mens zippers on left and womens zippers on the right. * [https://www.rei.com/product/235362/mountain-hardwear-bishop-pass-15-sleeping-bag-womens](https://www.rei.com/product/235362/mountain-hardwear-bishop-pass-15-sleeping-bag-womens) * [https://www.rei.com/product/235363/mountain-hardwear-bishop-pass-15-sleeping-bag](https://www.rei.com/product/235363/mountain-hardwear-bishop-pass-15-sleeping-bag) Nemo does the same: * [https://www.rei.com/product/228439/nemo-disco-15-endless-promise-down-sleeping-bag-womens](https://www.rei.com/product/228439/nemo-disco-15-endless-promise-down-sleeping-bag-womens) * [https://www.rei.com/product/251886/nemo-disco-15-endless-promise-down-sleeping-bag-mens](https://www.rei.com/product/251886/nemo-disco-15-endless-promise-down-sleeping-bag-mens) This is a unique option too: * [https://www.rei.com/product/231206/sea-to-summit-ascent-15f-sleeping-bag](https://www.rei.com/product/231206/sea-to-summit-ascent-15f-sleeping-bag) The North Face Cat's Meow was the one I had with L/R zips. But it looks like they took that feature away. I was also going to recommend the Kelty Cosmic Down as a cheap/budget option - but they also look to only sell right zip bags.

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.

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

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 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'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.

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 or a Nemo Forte. I have the cosmic for me, Wife,  my oldest, and youngest. The middle liked the Nemo colors more some got that for him. I like the cosmic for the light weight and good packability. The cosmic has some sweet heat vents, isn't down (doesn't pack as small but better performance if it gets wet/damp). Both have a zipper pocket anf good space. I'm 6', the rest of the family is shorter so they fit fine. Youll need a long version regardless. 

Depends on your climate. I recommend a 20 degree bag for our scouts. Synthetic for the younger scouts, down if an older scout needs a new bag. As long as you get a synthetic bag that isn’t more than about 3.5 pounds and isn’t too large from a volume perspective you can use that bag for both backpacking and other activities. I like the Kelty Tuck, Kelty Cosmic, and Kelty Cosmic Down for these use cases. I have a couple of zero degree bags, they get used like once a year in our climate.

Depends on your climate. I recommend a 20 degree bag for our scouts. Synthetic for the younger scouts, down if an older scout needs a new bag. As long as you get a synthetic bag that isn’t more than about 3.5 pounds and isn’t too large from a volume perspective you can use that bag for both backpacking and other activities. I like the Kelty Tuck, Kelty Cosmic, and Kelty Cosmic Down for these use cases. I have a couple of zero degree bags, they get used like once a year in our climate.

If you're just wanting to test this out, try to borrow gear. As others have mentioned, make sure you also get a sleeping pad with a high R value and know that temperature ratings on most bags are for survival (not comfort). Also keep in mind that you can layer pads/sleeping bags. So you could get a 20 degree and a 40 degree bag, which can be combined to go below freezing and you'll be covered for 3 different situations. The only bag I would consider from Cabela's would be a Kelty Cosmic Down.