This is fairly cheap and would work out great at both the backing and batting...just add a nice quilted cover. For those who have company that bring their furry pets to visit or ones that have them already.
http://www.qcidirect.com/quilted-chair-cover.html This also may be a great idea for very elderly parents or young children at home or in a nursing home chair. You could place another waterproof pad under this pad.