One of the keys to happy traveling is a contented butt. I've experimented with several cushion options for the Rolling Steel Tent's driver seat and ultimately rejected them all. Being an optimist (or a fool) I hold out hope for eventual perfection.
I've gone back to the regular old seat, but, as you can see, it's not in great shape. And vinyl causes butt and back sweat. So I got a seat cover.
I don't know if it will help the sweat issue, but it looks better. They come in pairs (because most people don't remove the passenger seat) so I might try doubling up. If nothing else, it would solve the question of where to store the second cover.