Ya, I remember REI selling it and I used bubble wrap (BW) for a short time. It was cheap and it did the trick until I could purchase some an insulite pad to replace it. I was tough then, didn't need any padding, just insulation. Mythbusters used bubble wrap and duct tape to make a sleeping bag and slept at below 32 deg F in them; several layers I'm sure. I'm always looking for something light weight to carry snowshoeing if I get stuck over night. I carry a thin CCF gray pad 48" long, but it would sure be a pleasure to have a 72" piece of bubble wrap, one more layer between me and the snow would have to be a good thing. I'm going to experiment with sitting on BW on the ice and snow this winter and let you know how it insulates.
Jim M