
NEMO
Disco 15 Series
Spacious for side sleepers; bulky, temp rating optimistic.
Running these analyses costs money. Buy through my links to help keep lights on! I may get a small commission.
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
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.
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.
When did you use the magma? The completely redid it a couple years ago, its great.
We're all talking about the bag, different product dude. \>REI wouldn’t return it because they’re like that now You can return REI products for a year if you're a member, 90 days if you're not. Idk how you managed to not be able to return it. They have the best return policy of any of pretty much any outdoor company, I just returned an ursack after like 11 months and got a full refund
I’ve enjoyed using my (updated) magma 30. I’d venture to guess it’s a 35 comfort at worst, and my unit is probably a tiny bit under filled, weighing 1oz less than stated. The exped seems a little anemic in comparison, a whole 2.6oz less fill in the same size, all while costing more
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)

NEMO
Disco 15 Series
Spacious for side sleepers; bulky, temp rating optimistic.
Hammock Gear
Classic Burrow 20°F
Budget king; very warm but heavier than ultralight.

NEMO
Disco 30
Spoon shape for side sleepers; prone to zipper issues.

Western Mountaineering
VersaLite
Durable, very warm; premium price, too hot in summer.

Katabatic Gear
Alsek 22°F Quilt
Versatile 3-season quilt; secure pad attachment, high price.

Ranked #1
NEMO - Disco 15 Series

Ranked #1
Kelty - Tru.Comfort Doublewide 20
Ranked #1
Enlightened Equipment - Revelation APEX

Ranked #1
NEMO - Disco 15 Series

Ranked #1
Feathered Friends - Egret UL 20/30

Ranked #1
NEMO - Disco 15 Series