|After struggling to remove the tight fitting foam pieces from my Ikea Poang chair and ottoman cushions for washing and to make a pattern, I thought I'd pass along my tip for getting foam cushions back into tight zippered compartments: I cover the foam with old, worn-out percale sheets. I just serge them on. I don't get fancy. The slippery sheet makes it easier to slide the foam piece into a tight cushion cover and the serged seam provides something to grab hold of to pull them out of a tight fitting cushion cover without adding bulk. I suspect old satin sheets would also work, but, uh, I've never owned any satin sheets.