The original bed in my Roadtrek was the three cushions that also serve as the seats for a dinette. Finally the spirit moved me to dramatically upgrade the bed.
Because I had purchased the fabric several months ago, all I needed was a piece of memory foam. I created a fitted sheet type cover for the original cushions covered with the 2” of new foam. I also sewed four pillows and the inset panels for the doors from the same fabric. The brown pillows are stuffed with my down comforters, sheets, and a couple down coats.