Space blankets are made of mylar, and are not porous. Not sure why people here think that they don't block moisture and allow evaporative cooling... https://e

Space blankets are made of mylar, and are not porous. Not sure why people here think that they don't block moisture and allow evaporative cooling... https://en.wikipedia.org/wiki/Space_blanket https://en.wikipedia.org/wiki/Space_blanket