Forte

+3 for Zenbivy. I am rotisserie chimkin. I will say - I started out with a Nemo Forte spoon-shaped bag and it did not work for me. It was still too narrow to rotate, and I got suffocated by the draft collar thing all the time. If you have access to an REI or similar, test the Nemo out in store. An alternative might be to buy a Zenbivy sheet and the adhesive clips to pair with a quilt that might be more affordable in Canada.

Another mummy bag in a mummy bag is underrated. I tried the sea to summit liner. What an absolute joke. I got a Nemo forte 20 that has a broken zipper. I put it in my other mummy bag. Absolute game changer. This probably isn’t helpful as you’re not carrying 2 bags. Sorry. Just shower thoughts

Not to convince you otherwise, I had the same problem, but like the sleeping bag. Nemo spoon shape was the answer for this side sleeper. Got the Forte 20.

You're welcome. Nemo Forte 20 is also what I use. Love it!

If you want something in between, look at Nemo spoon-shaped sleeping bags.

I have the Nemo and cannot recommend enough. The extra room makes a huge difference for comfortable sleep and it keeps you nice and toasty. I have the Nemo Forte 20 and have used it comfortably in single digits multiple times- just don’t forget a bandana/scarf for your face!

6’4” claustrophobic big guy slide sleeper and the Nemo Forte has been amazing!

Cheap, warm, or light and packable - you can only have two, you’re never going to get all three. You’ll also be colder in a bag for two. The more air space in the bag, the harder it is for your body to warm all that space. So the colder it is, the less comfortable that will become. Mummy bags are designed to be conforming to your body for that reason. They are not meant to be zipped together. So a pair of rectangular bags will fit together but be bulkier and harder to be warm in. Nemo Forte, Disco and Riff bags will zip together and be warmer- but they will also not be cheap enough for you unless you get the heaviest versions. Synthetic also breaks down faster than down. They are a compromise between mummy and rectangular. Then there is the pad issue. Two single pads tied together will have a cold gap in the middle. A two person pad weighs a lot and takes up more space in a pack. Two rectangular pads will do better than two tapered pads, same trade offs. Everyone has a different equation for what is important. But it’s hard to sell the gear you no longer want unless it’s of sufficient quality to be desirable. Higher end sleeping gear includes Western Mountaineering, Feathered Friends and the top tier versions of Marmot bags. if your boyfriend is already backpacking, he has cheap stuff. You say that he doesn’t have good stuff. I highly recommend that you start with moderate quality gear like Marmot or REI brands and get separate bags because you don’t even know how much you will want to backpack. He already backpacks and will want lighter and warmer. Get couples gear when you are sure you will want to go often with him.