Which two bag system: 30 and 0 degree bags?

Mike Islander

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I have a 30 degree bag and am looking for a colder weather bag. The 30 will take me comfortably down to 40 degrees, bearable in 35 if I pile on some nightclothes. For colder weather I don't see myself going below 10 degrees. I am been looking at a WM Sequoia MF with ovestuff from Hermit's Hut. Should give it a -2 rating or so. Will that be too hot at 30 degrees? I feel like I could vent it a bit if necessary, but have never actually slept with a good low temp bag in cold weather.
 

Marble

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Its fairly rare for me to need my 0 degree bag fully zipped up. Probably needs to be in the lower 30s or into the teens at night.

Is it for back packing or truck camping?
 

Marble

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Kifarucast just had a fairly good podcast on sleeping bags. Might give it a listen.
 

Jbehredt

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I’ve been using my woobie and WM badger (15*) in either/or combination comfortably for the last two years. Everything from 60 degree summer nights to a few few single digit nights last rifle season. Not sure how much that helps but......
 
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Quant

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I have a WM Sequoia...no overfill. I have slept comfortably in it from 15 to 50 degrees. 15 is the coldest that I have used it for, but I would have been fine at a lower temp, as I was only wearing base layers. I don’t recall being too hot in it, but the bag was definitely partially unzipped at 50.
 

tdot

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I have the 5 degree WM. I am pretty toasty at temps around freezing. At those temps it is open bag, no hood. The biggest problem is if I push too much of the bag off while I'm sleeping and then part of me is freezing and part is roasting. By about 25 it's perfect.

I've only ever seen overstuff increasing a rating by a few degrees. Maybe compare it to the volume of down used and temp change that WM uses for their overstuff.
 
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Mike Islander

Mike Islander

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Its fairly rare for me to need my 0 degree bag fully zipped up. Probably needs to be in the lower 30s or into the teens at night.

Is it for back packing or truck camping?
Definitely for back packing. I'm open to a little more weight to sleep comfortably. I doubt I'll be sleeping in below zero conditions voluntarily. I was in WY last year and had it dip down to -13 (was not camping). I wonder if a 5 degree bag would have worked inside a tent in those conditions with all my puffy clothing on in it.
 
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Mike Islander

Mike Islander

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UPDATE: The reason I am looking for a second bag is that I started camping and hunting in season three. Out here that means lows in the 40s, but out West it was below zero in late October. We stayed in a hotel instead of camping, because neither of us had the gear for camping in those conditions.

My thought is I'd like to have two bags to cover my needs. I like down and want them fairly light weight if possible. I have a Kelty 30 degree bag that is nice down to 40 or so. I think some guys would run three bags, but I am hoping to cover my needs with two. I would cover 0-35 degrees with the second bag, knowing if it unexpectedly dropped to -10 I could survive in a 0-5 degree bag if I put my puffy and some long johns on.

I could be all wrong about this, and that's why I am asking here. I can watch videos all day. The folks here get out and run these bags, so I wanted to mine that valuable knowledge if possible.
 

BuckeyeRifleman

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I got caught in that same storm in Montana this year, it was absolutely brutal. We were camping and had good cold weather gear but even then needed to hit a hotel at a certain point... things get tough when you can’t even keep your water from freezing in a tent with a stove. Next time I’m bringing a more substantial tent and stove, possibly a wall tent. We just had a little Cimmeron and cub and it just couldn’t keep up. Most years we would’ve been fine, but things got stupid. Backpack or spike camping for more than a night or two just wasn’t safely possible.

Based off historical temps I was worried my WM Kodiak GWS (0 degree) was going to be overkill. It wasn’t.

I’ve just got the one bag for now as I mainly hunt rifle season, but if I had to have two I’d choose a 15 degree and 0, but I prefer dedicated bags. A 15 degree bag plus a 30-40 degree quilt would probably give you even more versatility, just double them up when things get stupid cold.
 
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Matt W.

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Some good info for you to check out here:


The industry does not make this easy....

But, a 30 and a zero should be good to about 15 as a very GENERAL rule of thumb. Much colder than that I want an even warmer bag. If it is hot, I can always lay on top. JMHO
 

Aeromoto

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Jul 11, 2018
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I've got a 30 from Stoic and a 0 from Marmot. Went on a winter backpacking trip 2 weeks ago in the Tahoe region, probably got down close to 0. I ended up sleeping in my down pants and just a heavy weight merino top. I also had 2 water bottles with boiling water in them when I went to sleep to keep me warm. It did get a little cold on the last night, but I survived.

I say this about the water bottles so that you can think about other ways to keep yourself warm. You're already taking a puffy, so you can wear that to bed. You've already got water bottles, just boil some water before bed and throw them in the bottom of your bag. I don't think I'll get a bag warmer than 0...not sure I want to be out in that sort of weather.
 

Marble

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When I truck camp I use two bags, my back country bag, and a huge bag that I use as a blanket. I look at it like layering my hunting clothes.

I also then use the big bag to drape over quarters if needed on the trip home.

I also use a big tri fold futon for a pad. Warm and very comfy. Options are unlimited if staying at the truck.
 
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