I have Warm and Natural batting duck taped to a piece of insulation board. It makes it portable. I just lean it against my closet and slide it behind the door to the room if I want it out of the way.. We bought a 4 x 8 foot piece, and I cut the top two feet off. Wish I hadn't done that, but it still works for me. (taller would have come in handy many times.)
I'll take a picture, in case it might work for you. I am really happy with my design wall.
Dina