I don't do a lot of camping but wish to keep a sleeping bag for bugout purposes. Due to my location, I am forced to consider owning more than one bag to deal with temperatures anywhere from 0-100 degrees F. I'd like to have one bag that will accommodate liners that easily zip in and out instead of multiple bags. Does such a bag exist? If so, would this be the most practical approach?
Snugpak have a bag that will do that called the Special Forces combo bag. Its actually two very capable synthetic bags which zip into each other using a centre zip baffle
http://www.snugpak.com/index.php?MenuID=93-101&ItemID=74http://www.polimil.co.uk/acatalog/Snugpak_Special_Forces_Combo_System__166_18.html