OK, Noob here. This weekend I made a very cool bottom insulation for my HH UL Backpacker from a jumbo size sunshield. It looks very much like a couple that I've seen here on the HF and by all visual appearances it should have worked like a charm. It's 40 inches wide at the shoulders and hips and then drops to 28 inches from the thighs down and it's around 58 inches long. I think that it didn't work out for me because I probably used it completely wrong. I slept right on top of it (nothing except the sleeping bag between me and the "shield". It was not warm at all and eventually I felt dampness and was totally uncomfortable, achy and cold. Ultimately, I cried Uncle and went into the house around 3:30 AM and crawled into my warm bed. Finally, last night I decided to spend the bucks and ordered the HH Supershelter. What went wrong??? Should I have suspended the shield on the outside or should I have put something between me and the shield besides just the sleeping bag?