I kept reading about the different ways people made design walls to decide what would work for me. Mine is two sheets 1 1/2" foam insulation, 4' X 8' each. I covered them with 108" wide cream flannel. I used thumb tacks on the back to hold the flannel. Some people tape the flannel, staple it. I did tacks so if needed, I could take it apart to wash the flannel. Might add one more sheet. I'm not going to mount them at this time. I got the 1 1/2" thick so if I don't mount them on the wall, they won't bend. Right now I'm camped out in the dinning room quilting. New house, trim, lights yet to be done in my quilting area. It will get done in the fall.