how large is this bag stuffed?
BRIAN B With the supplied stuff bag, the dimensions are 12" in diameter by 18" in length. With a little effort, you could squeeze it into a much smaller space.
GREG S I bought a Deuter 65+10 Act Lite pack and this bag easily fits in the bag compartment. I even had extra room to fit the rain fly for a 3 man tent in the bag compartment as well.
I can give this bag my FULL endorsement!!!
BENJAMIN W It can be stuffed in the bottom compartment of an Osprey Aether 70 easily. It isn't the lightest or smallest, but it is definitely affordable and warm. If you have a large pack, than I say go ahead and buy the North Rim.