A tablecloth with a flannel backing works well I'm told or just plain old flannel. I purchased a design wall covering 3yds so its 108 x 108 and looks to be made out of flannel. I also picked up from my local lumber shop some 1.5" foam board to put behind it so I can stick straight pins in if I so choose. The flannel cloth came from a place called EverythingQuilts.com. Might check it out. I know I'll be cutting my down some but at least its long enough for what I need. Now to find someone to help me get it all up and working. RIght now I'm just using a large piece of 80/20 batting as I buy it by the roll.