I had acquired some good quality used cushion covers at a marine flea market in the Rio Dulce. They were not an exact fit, but would give us much more comfortable seating when at anchor or the dock then we have currently. It was time to get foam to make them usable.
Closed cell and non-absorbent foam is not available (at a reasonable price) here, so we went with the old fashion open cell foam. It means we have to keep them under cover or inside if rain threatens.
The upside is much more comfortable seating and the option to sleep outside. The downside is finding places to store them when not in use. The usual compromises we face each time we make a change.