coolmom42 wrote:
There is some stuff called Hy-Vent that boaters use to prevent that problem. It's a thick mesh that allows air circulation under the mattress. It's not cheap, but I don't know of a good alternative.
The condensation is from your body's moisture that gets trapped against the cooler wall or solid platform underneath the mattress.
Another alternative might be the use of the
bulk filter media sold by Big Box stores - cost about $20 for a 20 foot roll - it's fibrous and should allow air to flow under the mattress.