WE installed the "Moisture Prevention Underliner Fabric" [sold by Sail-Rite] today...
This has 2
relatively smooth sides and came in 60"X90" sheets..WE set it in and folded some edges and only cut off a bit, and it seems to fit well...up the front end and up some on both sides. We'll see how it works. Have a 2nd roll for the dinette cushions, but will not use it this trip, as there's only 2 of us
this week...and the dinette will stay as a table.
Got it in a couple days via UPS in 2, 7lb rolls from Sail-Rite. BTW the rolls came in heavy vinyl shipping covers, which I saved for use to store stuff in later.. I never wast usefull things!!:
Looks like it will hold up the mattress about 3/8".