"Gordon Wedman" wrote in message
news:WyRtg.49694$B91.234@edtnps82...

I have been using a 1/2' thick closed-cell foam sleeping pad that is sold
in sporting goods stores. Water vapour cannot pass through the foam to
condense on the cold wood underneath and the foam itself does not get cold
enough to condense the vapour. Much cheaper than hydrovent. Just buy the
cheapest you can find. No difference as long as its closed-cell.
I'm trying self-inflating backpacker's air mattresses under the cushions.
So far they're working great, and also make the bunks MUCH more comfortable
to sleep on.

Karin Conover-Lewis
Rawson 30 ketch "Escapade"
Marinette WI