I used 2 sheets of purple (1/2" I think)foam insulation board covered with flannel, no batting. I cut the height to 6 feet because that's all I can reach, but after I cut it, I realized the ceiling would hold it. I use big push pins on the edges of the flannel covered foam and double stick tape on the back to keep it on the wall. I love the foam because I can stick pins in it with no worries and the flannel is washable when it gets dirty. I can't imagine how I lived without it.