You get what you paid for with this bag. In the Fall of 2006, I took this bag to Flagstaff, Arizona for a weekend outing. I was cold on a 36 degree night when dressed in sweats. My feet were especially cold as there is not a ton of fill near the end of the bag. The next night it was 40 degrees and I was comfortable. For twenty dollars, it is a good 40 degree bag. However, I think you can find them cheaper elsewhere.