I bought two insulation boards at the local hardware store and then duct taped the two of them together so could double my size to 8x8. Then I used cotton batting to hang on it with 505 glue spray so can be removed when it shifts a bit. I have had the batting on it for over 5 years and it still is attached and nicely shaped. I think with it being attached with the 505, it stays nicely. I pin and can just set blocks on and they stay. I pin because when you blow by or a breeze from window comes in, they will fall off. When done with, it folds nicely and store away behind sofa or in garage. It could even slide under a full size bed if that is what you have.