I've tried all kinds, including those mentioned above. I don't have a wall large enough (without furniture in front of it) to hang anything. DH got some 2" thick foam insulation board from Lowes. It was 2 foot wide by 8 foot tall. He cut off 2 feet so it's now 2 x 6 foot. I have four panels. He duct taped them together....he alternated the taping - taping the first two panels on the front and the next two on the back. He duct taped around to protect all edges. Then we taped cheap batting on the front......It can fold up and be stashed in a closet.