
Big Agnes - Sidewinder SL 20°
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Based on 1 year's data from Mar 17, 2026 How it works
Reputable brand. Will likely be expensive. For you 5°C you want a 0° or a -7° bag. In north America that would be a 30 or a 20 and I recommend a 20 Figure out synthetic vs down and side sleeper vs back sleeper. Watch a bunch of YouTube. Read articles.
I'm in Canada. My Big Agnes bag is still called sidewinder 20 😁 Over the years I've learned some understanding of freedom units
I bought the 20 and love it. I honestly hated backpacking until I got this and could sleep on my side. We mainly only do winter camping, so I needed the 20. I don't find it overly bulky by any means.
No, I don't feel it's any thinner on any side imo. Mainly because there isn't really a "bottom". Its typically in the 20s when we're camping and I'm still in pants, sweatshirt, and socks. So take that for what you will. I think it depends on everyone's tolerance ha.
I LOVE LOVE LOVE Durston Gear tents. I've got the Xmid 2 and now the Xdome 2 as well. Superior to pretty much any comparable tent that bats way above it's price tag. $269 and under 2lbs all in. As far as sleeping bag, my first one was the Big Agnes sidewinder 20⁰ bag and I liked it. But after having gone out more and more I wanted something that packed smaller so now I've got an enlightened equipment convertible bag/quilt that's 950 down. Packs smaller, a lot smaller, and is substantially warmer overall. But we are comparing a $175 bag to a $400 one.
I do trips late September and I use big Agnes sidewinder sl-20 on a helinox lite cot. Last year it was unseasonably warm at the beginning of the trip but got cooler on the last 2 nights. The first couple nights I just slept with the zipper up half way. IMHO being a bit warmer at night is preferable to being cold. I think in most (not all) September trip situations a 20 degree bag is a good choice. I would consider using my 0 degree quilt (without the bag) if it were expected to be unseasonably cold.
If you are a side sleeper check out big Agnes’s sidewinder or the torchlight- I am also a side sleeper and I like these two
Seconding the Big Agnes down sleeping bag! I’m a side sleeper and finally invested in a BA Sidewinder after years of getting tangled up in my standard bag. More than worth the money.
Quilts, semi rectangular bags (Sea to Summit Trek and Ascent Down) or the Big Agnes Sidewinder series are what you want. The Nemo Spoon series of down bags are also quite roomy. I sleep on my side. I use Hammock Gear Econ Borrows most of the time and I have a Marmot Col -20F bag for anything 20F and below.
Ohhh well my big Agnes mattress, my side sleeper big Agnes sleeping bag, my marmot tent
This summer is my first time sleeping in a new bag shape too. I bought the Big Agnes Sidewinder because I’m a side sleeper, and it was so much better than my last bag! Stayed SO warm and cozy.
Did this person have any basis for their statement? They make very good bags. They're not the lightest or the cheapest but they are also not the heaviest or most expensive. They're very good quality bags made by a trustworthy company that backs up their products with a good warranty.