Well, not an expert on the issure, but we sure sleep good up there in the V-bierth on them foam mattresses.
We think it is 4" of open cell foam with sun-brella fabric
All the cushions
and mattresses was made over 10 years ago by a small Ft. Lauderdale canvas
shop named Ocean Side Canvas
Back then they were brand new and catered to guys like us.
These days they are busy making stuff for the mega-yacht crowd and have a long waiting list for 'little stuff".
Same with the guy that re-wired my boat 10 years ago:
He was good and did a hell of a good job on this here 33' sailboat: All his connections and wires are still like brand new..
Ran into him 5 years ago and asked for a small "check-up" as I had a problem with the house bank.
No change...Same thing, he was into big power boats and had no time for the little guys.
Not sure I would blame him...He and the canvas guys paid their dues and they been climbing the local ladder....Now close to the top and if I want their services, I better pay the same rates as they get from the mega-yacht folks.
Uh, what was the question again...?
Something about the V-berth..?