Oh, a sheet might be a good idea, thanks. I have NO wall space to put up anything so I plan to mount roller blind hardware to the top of my double door frame and fix the piece of flannel to the roll so it can go up and down as I need it, taking up No real estate. It will need to be just the flannel fabric so I want one that is sturdy and will hold up. I'll need a large piece, perhaps backing size as I'd rather not deal with seams. Flannel fabrics are not created equal, have seen something called '2-ply', but not sure what that means. Have also seen some that you can look through. I have little shopping nearby so this will be an online purchase. Any manufacturer/company recommendations...?