ZipBed

Any thermarest bag is a good start and I've just tried out the ZenBivy and so far absolutely love it. Would also say that a good sleeping mat goes a long way to keep you warm. You could have the best bag for the cold but a weak mat can undo all the work of a good bag!

I have a zenbivy and I love it. Don’t know what their lowest temp rated bag is though

Agreed. As a thrashing side sleeper this bag has been a godsend. It’s super versatile

Zenbivy - best of both worlds! I have the 10f and 25f light beds and they're super comfortable.

Zenbivy is the best of both worlds. Most comfortable camp sleep system ever IMO.

They’re constrictive and you get twisted up inside the lining if you move in your sleep. Zenbivy came up with the solution to this and other problems.

Sierra Designs has or had one recently. I tried it out but didn't like it much and ended up going with a Zenbivy which is exactly what I hoped it would be.

if you're worried about being cramped maybe try the [zenbivy](http:// https://share.google/tGLl4cDuNv4Fhm4ng)?

Zenbivy. Especially if you’re anything but a back sleeper.

I regret the money I spent on my Zenbivy, I get so cold in it.

Try a Zenbivy, it combines the best features of a quilt and sleeping bag, once I tried one I did not go back to sleeping bags or quilts.

Zenbivy is a good option for this need

Zenbify fits the design you're asking about, but is above your cost by a decent amount. They are super comfortable though, and I love mine. Might keep an eye and pick up on sale/discount or with a coupon code. I'd generally recommend 2 sleeping bags/quilts vs a shared double unless you both tend to sleep at the same temperature. You can also get sleeping bags that zip together if you do want to share space but have the option for solo/separate use. That being said, Kelty makes good stuff so I'd trust their double if it fits your needs.