Originally Posted By: MostlyHarmless
I see a lot of people using air mattresses for car camping in the summer. In less than optimal summer temperature, an air mattress will conduct heat away from your body and to the surrounding air. If you or someone in your family wants an air mattress then put a groundsheet ON TOP of the air mattress to insulate yourself from the cold air mattress.


A sleeping pad such as a Zotefoams Evazote (they have a few different styles/ other models) under the mattress is very effective in stopping the cold ground from sucking away your body heat. We use this method whenever we overnight hike in cooler and cold weather well down below zero.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock