Mtn. Hunter, 1.9 lbs. ? The WM Iroquois I use goes 1 lb., 9 ozs. in the long size and works well as my all around, hunting back pack bag. Stuffs into 6X12 inch stuff sack. I can use a nylon tarp, my OR bivy sack, or a poncho with it for a minimum, light weight camp.
But not for emergency over night stays. Too much to carry and often not needed. I think you need to try out the ensolite pad, w/ bivy sacck or light tarp and the chemical hand warmer method. Try it out in mild weather, then work up to colder weather. I think you'll be surprised how well it works. But, more important, it will give you confidence you can do such a thing and get by if you get caught out over night. E