I thought I'd throw this question at the Mountaineers…. I have an old (25 year old) 650 fill REI bag that's rated at -20F. It's seen better days and I'd like to replace it. I'm looking for a new bag rated at or near -20F. I sleep extremely cold. This bag will be used in the PNW sometimes in snow caves….sometimes in a tent. When in a snow cave I'll have it inside my OR Gore-tex bivy.
Which one should I buy?
Feathered Friends has some nice -10F and -25F 850 filled bags.
I see that Montbell has a -20F bag with 800 fill.
http://www.montbell.us/products/disp.php?cat_id=796&p_id=2321108
I see WM has a bag called the Puma MF at -20F
http://www.westernmountaineering.com/index.cfm?section=Products&page=Sleeping%20Bags&cat=Microfiber%20Series&ContentId=43
I'm sure there are more.
THANKS

