Sierra Designs Waylite

I purchased this bag 5 years ago, and have been very disappointed with its performance. I spent many nights freezing in this bag when the temp. did not even drop below freezing. I finally sent it back, (after 2 years) explaining how dissapointed I was. I was sent a new bag with no questions asked. (When I pulled it out of the box it was immediately obvious that the new bag had significantly more insulation than the old one did.) I am happier with the new bag, but am not convinced that the bag lives up to its rating.