"Great bag, on the expensive side. The Swallow is a slightly larger version of the FF Hummingbird. This bag, rated at 20 degrees F has kept me warm on nights that got down to 2 degrees F when I was properly dressed. It is a compact lightwieght peice of equiptment that I couldn't part with at this point.
A couple of negatives, this bag costs more than a lot of other bags out there. And the zipper is not the easiest to operate, I have to be careful when zipping in order to avoid snags. A more minor annoyance now than it was at first. Overall I feel Ive gotten my moneys worth."