It is what it is, a mylar emergency sleeping bag. The nature of it would allow, I suppose, to call it a bivy sack for a day or two, before you called it a wadded up ripped up piece of metalized plastic. Ended up buying some actual bivys since i just cant make myself trust this in a bug out situation, but i will keep them in the sack with the bags just in case.
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Instead of buying a far infrared device just get this. The far infrared waves are reflected back. It's called D. I. Y. poor folk nutrition.
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