Lost Ranger 3N1

As mentioned by others, rather than getting those heavy square bags you could opt for a down quilt. By the way you should make sure that you are actually a warm sleeper also out in the tent. I am a warm sleeper at home but when I an camping I am still getting the chills every now and then even if the comfort rating of my sleeping system is on point. The thing is that humidity and wind play a huge role on how the heat is sucked away from your body. By the way, even if bags are ISO rated, every company has its own standards (by the way even industrial production has certain variations in build quality and material). So, rather than trying to pinpoint the exact temperature your are going to sleep at that night, you could be better off playing it conservatively and go for something like a 0C bag with vents and double way zippers so that you can adjust your temperature.

Yes quilts are very popular nowadays. Right now I am using a hybrid setup, check out Big Agnes’s Lost Ranger lineup. It is made of one quilt-like piece and a mummy bag too, so that you can use the three setups: only quilt for 10C, only mummy (designed specifically for those who toss and turn a lot) for 0C and the two together for -11C. I love it!

Unrequested advice, but I am using Big Agnes 3in1 Lost Ranger which is a hybrid sleeping bag with quilt-like feeling. I am a side sleeper and I love it!

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.

For cheap, no. https://preview.redd.it/crlfe5zr9u1g1.jpeg?width=447&format=pjpg&auto=webp&s=528fa1c294cba5226b5f77d7a984a5ee5ee7ce1b Though, a system bag like the [Big Agnes Lost Ranger 3n1 0](https://www.rei.com/product/245987/big-agnes-lost-ranger-3n1-0-sleeping-bag) will get you awful close if you add the [Outdoor Research Helium Bivy](https://www.rei.com/product/203558/outdoor-research-helium-bivy). This is what I use. You could also build a similar system that is a bit safer from a 40 degree top quilt like the [Enlightened Equipment Revelation Apex Regular-Wide](https://enlightenedequipment.com/revelation-apex/) and any 20 degree Down mummy bag like [Mammut Comfort Down 23](https://www.rei.com/product/247720/mammut-comfort-down-23-5c-sleeping-bag)

Well in the Big Agnes system, the quilt is mostly for warmer weather, where that is less of an issue. Also, what isn’t obvious from quilts is that they actually deal with tossing better than folks expect. The key is that to “Collar” is oversized like a big draft collar on a traditional sleeping bag. Quilts like the Zen Bivy, and the above bag completely negate the issue of drafts coming in the side by by zipping or climbing the sides down. This makes means drafts can only come in the top. Cinch them up before bed and don’t worry. I bought the old UL version back when they offered a 800 fill power version. Kept the whole system below 3lbs. Dicks sporting goods still has 2 in stock [here for $470](https://www.dickssportinggoods.com/p/big-agnes-lost-ranger-ul-3n1-0-sleeping-bag-23tumalstrngrl3n1csl/23tumalstrngrl3n1csl)

I have a Big Agnes Lone Ranger 3 in 1 sleep system and have used it in British Columbia over summer/fall hiking and took it to Mt. Kili this past December and was warm every night up there. Loving it so far, and both the bag and quilt compress down well for packing. Whatever you go with, best of luck on the trek to Kili!! It was amazing

Big Agnes Lost Ranger 0F Sleeping Bag and Pad. I can adjust accordingly with this bag because its two bags in one really. You specified camping and this is a great camping bag. I got it cheap a couple of springs ago. I like it.

These were all over the industry a couple of years ago, but have fallen out of favour, and I actually can't find any current single-bag, adult sized offerings by a major company that are made this way. The Rab Mythic Ultra 120 "modular system" is now discontinued, I believe, but would be the most UL uninsulated bottom option. The BA Lost Ranger is an actual modular system consisting of two bags, a fully insulated mummy bag and a backless/pad sleeve style outer rectangular bag

I would go with a quilt, they are great for moving around. Zenbivy is most peoples favorite, I really enjoy my Big Agnes.