Bought this 0 degree sleeping bag for Elk season. I've always struggled with warmth before this bag. While this season was warmer than past years only dropping into the 20's at night, I never got cold with this like I have other bags. Even without a source of heat part of the time It kept me plenty warm.
I'm very impressed with how light this bag is, and the warmth it provides. It's probably too warm for much over 30 degrees. I'm very happy with it so far and Im confident it will keep me warm in a single digit season in the future.