I found a piece of peg board in hubbies shop. Not sure of the dimensions, but probably about 18 inches wide by the length (plus a few inches) of my ironing board. Covered it with a couple layers of thin batting then an old sheet, which I laced on the back with heavy string. Didn't put any thing on the back to keep it in place. Not a problem for me, but the peg board is quite heavy, maybe that's why it doesn't move around. Been using it for several years, without a problem. Not sure, but I thought the peg board would be good for ventilation.