I back everything with good quality muslin..either natural or unbleached....on bed quilts looks like a whole cloth...and, my luck, if I were to use printed fabric..either to use it up or just to coordinate, (at the today prices...not me)..anyway, my luck, thar would be what I would need in my next project. So to keep it mindless...muslin, besides I love the feel of washed good muslin...just me