I ordered a 10'x4' piece and intend to follow the steps in the video to make a booster for my OneTigris winter underquilt. I sleep cold, and the uq didn't do it for me below 60 degrees. Last night, however, in the low 40s, I slept very warm. What I did was boost the uq by laying a very lightweight Thinsulate LiteLoft sleeping bag into the uq, spread out. I will compare the results using the Reflectix booster to that with the light sleeping bag. The bag is lightweight and compresses very small, while the Reflectix is even lighter but bulkier. I don't think the bulk will be a problem, though, because, I am not a lightweight camper. Right now, I go only where I can take my Jeep, but I intend to build a light trekking trailer for packing so that I can take bulky and heavier stuff without having to carry it. I like my comforts and won't mind pulling a mile or two. :-)