Sleeping Bags

[Chris Ross <>]

Peter,

self inflating mattresses like the Thermrest have foam with a memory 
inside, the tough outer coat traps the air.  Compared to pump up 
mattresses they are chalk and cheese, the Thermarest will keep you warm 
on the coldest nights, while the air mattress will leave you shivering.
Chris

On 18/06/2011 5:58 PM, Peter Shute wrote:
> Chris, is heat loss through convection as bad in self inflating mattresses as 
> in the ones you have to pump up? I've never used one, but imagined they had 
> some foam built in.
>
> Peter Shute
>
>
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