Originally Posted By Rick_D
I hate to quibble with a Canadian, especially from here in California, but use the foam pad on the ground and the mattress on top, not vice versa. Reason: you don't want the mattress in direct contact with the cold ground/snow, losing heat via convection.

(See the "Pro Tips" in this FAQ)

http://www.cascadedesigns.com/Therm-A-Rest/FAQ

Cheers,


Ahem - only works when the ground is colder than the air..

In my world -30C air is a lot colder than snow on the ground. snow is an excellent insulator..

(now having said that by the time I'm at those temps I have foam top and bottom)

Anyway, I usually don't buy that "accepted wisdom". The ground is often warmer. if you're on cold exposed rock it's different. use your brain and decide based on where you're lying.
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