Rachel from Imagine Gnats shows how to make an office chair cushion with a removable cover. She used a laminated cotton which is easy to keep clean. A zipper on the back allows her to take it off should she need to wash it or perhaps replace the cushion inside. Her tutorial is part of the Home Sewn series at Living With Punks. Go to Living With Punks to find her tutorial.
[photo from Imagine Gnats on Living With Punks]