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This is for anyone with extensive winter experience (this means you, Bill, hehehe) and I know there is a similar thread here somewhere, but I'm asking anyway.
I am considering buying a winter bag for next winter. I am in no hurry and will be looking around for a deal over the summer. I only do a trip or two to the Sierra each winter, so I know pretty much the temp range, although I might do a trip to Ontario where it will be a lot colder.
My current bag system is a 23F (-5C) down bag inside an MEC overbag that adds maybe a few more degrees. With my parka tossed over the top, I was toasty in Yosemite down around 15F or so with only my base layer Capilene, expedition socks, and a balaclava on.
I could get a 0F bag, but am considering getting one for much colder temps. My bag weighs 45 oz.;the overbag adds another 25 oz, total 70 oz.
I could buy a WM Puma good to -25F and it weighs only 55 oz, maybe a few more for the long version.
So, the dilemma is this-would buying a Puma or similar bag be too much bag? Should I get one with the MicroFiber or similar shell or get Gore-tex? I have read that Goretex won't breathe in really cold weather, so is it worth the extra money?
Also, my present bag is 6'6" even though I am only 5'10." I don't recall why I wound up with a long bag, but I like the extra bit of space. I'm thinking of getting the same length again. A few extra oz. won't bother me and I don't think a shorter bag is any big advantage. I am not very heavy, so a standard bag like a Puma would fit me just fine from what I read on the WM site.
Feathered Friends makes a similar bag using eVEnt.
These bags aren't cheap, and one problem I have is I want to actually see one before buying anything. A16 in WLA has some WM bags, but not the Puma, but at least I can see how they are made.
Any other suggestions? I don't buy a lot of gear, so I want to get some feedback before making a decision. Thanks.