Replying to my own post above:

The 'space blanket' is actually a, "Thermos All Weather Sportsman's Blanket." Heavy, water proof material with a strong weave and aluminzed/thermal reflecting on one side. Big enough to cover most of the floor of an Eureka 4-person Timberline tent.

FB
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"...inalienable rights...include the right to a clean and healthful environment..." Montana Constitution