I have a roll of something similar...no bubble, just a thin white layer of open cell with the silver on the back side...very light. It came in a 4 ft wide roll...Ijust cut a six foot piece and put it between the layers of my WBBB 1.1 It got down to about 40 and I had a slight cold but that was it...I had a down sleeping bag 25 rated...I just stuffed a fleece shirt under my butt- good to go for the night.......I am a cold sleeper too fwiw...5 oz for 4x6 sheet...I personally wouldn't waste my time sewing anything on to it, not durable enough...Iplan on using in a traveler as well...just put in the hammock and lay right on top of it...easy peasy.
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