Temperature Rating: 20degree F ( comfortably so(
Weight: 1lb. 5oz.
This is an amazing bag! Very lightweight, very compact when stuffed.
The fit is interesting. It is wide in the shoulder to torso area, and tapers sharply down to the leg area. There is plenty of room for layering underneath. I can comfortably wear a Montrail Thermalwrap Jacket and Pants in this setup for colder use.
My only beef with the bag is the short (18") zipper, with no draft tube. You have to worm your way into the bag, but you do get used to it after a couple of trips. In colder temps, I found I was most comfortable with a microfleece sweater because of the lack of a draft tube. Its lightness, warmth, and packed size more than compensates for the zipper.
Overall, a really great bag, well worth the price tag. I'd give it 5 stars if it had a longer zipper.