Re: Boat cushions
We just got bottom-sider clones from C-Cushion. I made "pillow case" storage covers for them so i could stow them in a cockpit locker without worrying about damaging them. I went to a dollar store for the cheapest sheets I could find for the material.
At first, I was concerned about them blowing out of the cockpit, but that hasn't seemed to be a problem. If I see them starting to lift off the seats, I'll probably use some type of fasteners. They are quite an investment, but the admiral loves them.
We still use all cloth, folding stadium seats for back support. They do tend to fly around , so they get tethered.