REI Co-op - Magma 30

It got down to 25 while in my 35 degree comfort rated REI magma down sleeping bag. I had pad with R-value of 2.5. I wore non-cotton thermals from Walmart. I slept great. I'm also a 6' tall 185lb man that likes the cold. I think that matters. I wouldn't suggest that setup for everyone. Also, the weather had been warmer previously so the ground temp wasn't that low.

You want a bag that’s rated for real cold, not just “summer temps” so a bag rated around 20°F (–6°C) to 30°F (–1°C) is the practical sweet spot for those conditions. With that said, your pad is decent and pairing that with a bag that actually matches the sleeping pad’s insulation would keep you warm bottom-to-top instead of leaving a cold gap at your torso. The 75-liter pack size you have also gives you enough volume for a real backpacking-appropriate bag like either: - the REI Co-op Magma 30°F Or - Feathered Friends Flicker 20°F / Down Or - Mountain Hardwear Lamina Z-AI 20°F Which I personally think are all really good for your use case, the REI Co-op being my personal choice if I had to choose. Otherwise, try [11 Best 2-Person Tents for Camping and Backpacking](https://alaskanarrows.com/11-best-2-person-tent-camping-and-backpacking/) for other options GL

I just got the magma 30 and would recommend. Compact, lightweight, and very cozy.

Did you get the new magma 15? I got each the 30 and the 15 and while I love them, I feel like there’s such a huge gap in temp conditions. The 15 I’ve slept in down to about 22 and it was WAY too warm still. If I slept in the 30 down to 22 I’d undoubtedly be cold. I just think it’s bizarre they came out with two bags that seemingly have a huge gap.

I got an REI Magma 30 on sale last year for like $230. I absolutely love it and it weighs in at least than 1.5 pounds. I haven't really tested the limits of the quilt by itself, but it's definitely warm enough to wear lightweight sleep clothes down to about 40F. With warmer base layers I could probably nudge it down to freezing.

I have the REI Magma 30 and I've slept comfortably down to about 35° with it; I could easily take it down another 5-10° with a second lightweight blanket and good thermal long johns (my pad is a Big Agnes Rapide SL). REI has their Labor Day sale on right now so it's a great time to shop.

I’ve been using the REI Co-op Magma 30 for a year now and it packs down really tiny, like Nalgene bottle size. Super warm too, especially if you’re not going in super cold temps.

REI magma 30. It’s down so packs small and it’s <$400. If you have a larger budget, go with the other posters recommendation.

Seconding this one. I just got one this year and really like it.

Go with the REI Magma 30, it's ultralight, packs small, and perfect for 45°F with an underquilt. It's 329 on rei official website. Many reviewers highlight how it’s easy to vent or cinch, works great as both a quilt and a blanket, and is ideal for backpacking or hammock setups. On the other hand, you coulld also take a look at NEMO Disco 15, maybe an overkill for 45°F but insanely comfy and reliable — great long-term buy if you value warmth and durability over pack size. FWIW, I recently did an analysis on Reddit data for sleeping pads. Basically ranked them by aggregated sentiment. Maybe you'll find it helpful [https://redditrecs.com/sleeping-pad/](https://redditrecs.com/sleeping-pad/) You can filter and get a breakdown of what ppl have said about the most often recommended ones (disclaimer some links are affiliate they help fund the analyses)

Magma 30 is pretty good. Make sure you have a good sleeping pad, r value of at least 3.