What is an alternative sleep system if I don't want to use a down mummy bag for winter camping?

Question

I would like to winter camp in a 4-season tent but am interested in alternatives to mummy sleeping bags. I want to avoid that shape.

What alternative sleep systems do people use that are appropriate for winter camping?

Expected conditions:

Is it the mummy bag or the down you want to avoid? If, for example, you're vegan you could simply buy a non-down mummy bag. Synthetic fillings are quite good these days — Chris H, Commented Oct 24, 2018 at 11:53
@ChrisH I want to avoid the mummy bag shape. I'm a side sleeper and find most of them uncomfortable. — birch, Commented Oct 24, 2018 at 13:26
Fair enough. I'm also a side sleeper and have a tapered bag with a hood, but not as tight as some mummy bags. Shoulders are the issue for me as I tend to leave the hood loose — Chris H, Commented Oct 24, 2018 at 13:47
I've always used my mummy bag as a quilt though not many would use quilts at that temp perhaps. The other thing to do is using vapor barrier clothing (especially if main insulation is down) as the freezing point will be somewhere within the insulation. Fine for a couple nights but not for extended trips unless you can dry it. — topshot, Commented Oct 26, 2018 at 11:58

Charlie Brumbaugh · Accepted Answer · 2018-10-24 16:29:53Z

2

If you need extra insulation with a regular sleeping bag you can,

With that said -15F/-26C is not all that cold, you will find plenty of non mummy sleeping bags that are rated to -20F.

answered Oct 24, 2018 at 2:06

Charlie Brumbaugh

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By non mummy sleeping bags, do you mean the rectangular bags that don't have any kind of closure around the head?
– birch
Commented Oct 24, 2018 at 4:43
1

@birch Not the rectangular ones but the angled non mummy ones like say this amazon.com/Slumberjack-Latitude-Degree-SyntheticSleeping-Bag/dp/…
– Charlie Brumbaugh
Commented Oct 24, 2018 at 6:11

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