Big Agnes - Lost Ranger 3N1 15°

What are you planning to use this for? Is your partner a back or side sleeper? These bags have very different weights and temp ratings. The Echo Park bag is v heavy (nearly three times the physical weight of the Greystone one), so would be awful for a backpacking camping trip but might be lovely for a car camping trip (albeit, I really doubt you need a bag rated to -18C for UK camping!). I use a Big Agnes Bag (Lost Ranger 3N1 15), which seems to be a lightweight version of the Echo Park bag, and I love it. I like the padlock system, which anchors it to the pad, and the side-sleeping bag/quilt, but those might not be important to your partner. I also primarily backpack, so weight is crucial and it’s excellent to be able to ditch the bag in the summer, halving the overall weight of the system.

I'm in central Idaho. I use the Big Agnes Ranger 3-1 15 Degree bag for my elk season that runs late October into November. The double bag combo works well for keeping warm into the 10-20 degree overnight temps. I pair it with an inflatable pad with an R value of 4. A good warm pad makes the biggest difference for me. I'm not sure how you are, but if I don't get good sleep, my motivation tanks, especially as I get into the later days of my hunt. If you're not taking a hot tent you should get a bag that will keep you comfortable in freezing conditions.

Having tent camped for years, then hammock camped for a decade, and recently gone back to ground I can honestly say this: quilts for hammocks, bag for tent. Quilts are too much work with a sleeping pad. You are better off getting something like a Big Agnes sleep system bag and pairing it with a pad. Much easier, and less drafts

I have been using a Big Agnes down bag. I think it was in the “ranger” series. They change models every few years. But stick with the “sleep system” bags. They don’t have a bottom side similar to quilts, but they stick to your sleeping pad much better, and wont let drafts in when you move around. Only issue with their bags are the temp ratings are not the best. But I mainly tent in warmer temps and save the hammock for really cold winter temps. (I went back to ground because I finally got a dog to take on adventures, and I want him safe from mosquitos and what not at night just like me)

I have the Big Agnes Lost Ranger UL 0, which is a hybrid quilt-like solution, but with an inner sleeping bag. The inner bag is rated for -2C and weighs 850g. You could keep the outer bag for less cold nights (around 5C) and the whole setup for those really cold nights (-11C). It’s a bit pricier than usual bags but it’s so versatile and they are actually 3 bags in 1.

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!

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

We have a Big Agnes something or other 15 degree down bag we bought for around $300...10 years ago. It's great, although more like a 30 degree bag. Size / weight is about equal to two sleeping bags. We also tried out Feathered Friends' Spoonbill which is well out of your price range but might be interesting to look at to see how an actually warm two person bag looks.

 So the problem with any normal two-person sleeping bag is that there's an air gap between you if you don't sleep snuggled up.  The Big Agnes we have has a small flap that covers that up. We have also stuffed clothes in between us when it was colder. That works for 15 to 20°, but not colder. The reason I said the spoonbill was interesting is that it has individual draft hoods for each person so you share warmth but actually can't cuddle. 

We use a Redverz Attacama tent. [https://redverz.com/](https://redverz.com/) It is three person tent, with plenty of room for gear. It is absolutely waterproof. Assembly is not especially fast, but is uncomplicated. Having two people helps. It is tall enough to stand in and the vestibule/garage in enormous. While the "garage" is marketed and completely capable of holding a motorcycle, I never seen anyone actually put their motorcycle in it. It packs into a 50 liter dry bag with some room to spare and weighs 14 pounds. I carry it on my passenger seat. [https://photos.smugmug.com/photos/i-PLNrsMx/0/XL/i-PLNrsMx-XL.jpg](https://photos.smugmug.com/photos/i-PLNrsMx/0/XL/i-PLNrsMx-XL.jpg) It fits all of your criteria except "compact". For sleeping, I'm all in on Big Agnes system. The Big Agnes "system" uses a sleeping bag with a pocket in the bottom to hold an insulated, inflatable sleeping pad. There is no insulation in the bottom of the bag, that pad is the insulations. It is a great system and you can never roll of your pad. Get the "pump house" to inflate the pad.

I read the comments about enlightenment equipment, then went to the site, damn, they are too expensive. I looked for a quilt I would like, 1000$ no thanks. Personally I have Big Agnes and they are high quality, in my experience, and cheaper. I have a -15 degree down sleeping bag from them thats going on about 12-15 years. If my bag falls apart, I'll just stuff it and sew it back up.