Re: Sleeping Pad for Winter Camping
My thermarests are self inflating with a layer of foam on the inside...i store rolled up tightly.
when the valve is opened the foam expands and draws in air and inflates. If you want it firmer, you simply blow till you achieve desired firmness and then close the valve.
To deflate, open the valve and roll tightly,then close valve.
I ditched the army surplus style foam bed rolls long ago, I can roll my thermarest up tighter, and it provides more comfort for me.
So to answer your question, they are self-inflating foam air mattresses! Lol.
SSgt USAF 2004-2010
If you want peace, prepare for war.