"... skin to foil contact ..."
I wonder if that's really true?
I used to have a great Ford panel van that had been insulated by the previous owner. When I got the Dodge window van, I was sleeping in it in the Cascades when the temps dropped and I nearly froze. I opened one of my El Cheapo emergency blankets and pulled it over my bedding. I was much more comfortable in a few minutes.
It crackled like a baby playing with cellophane, though.
Sue