I think, if I'm not mistaken, and please correct me if I'm wrong, but the reason Gizmos work is not so much for their insulating qualities, but more from their reflective qualities. Is that right? Following that logic, it seems to me that the use of the reflective material inside the pup would have the same effect as hanging, say, a quilt - or any other insulation for that matter. That's why Gizmos are placed on the outside of the bunk roof, rather than the inside. Covering the outside with the reflective material works by not only adding layers of insulation, but also reflecting the sun's rays. Am I right on this, or am I just whistling in my hat?