I've never used fleece as backing...merely used it "as is" for an easy lap robe, covers for furniture where the dogs love to lounge, etc. And I've not noticed if it shrinks, but- why not? Isn't it Polyester and doesn't all poly shrink in the dryer? That's been my experience. Also getting the (other) chemicals out of it would be a goooood idea before using it. I'm with Candace, tho I don't always wash my cottons before piecing and quilting. I like the casual look, so if it rumples a bit, all the better. Some items, like wall hangings, are another story; I want them to remain the same for many years.