I have backed several quilts with fleece blankets from Walmart and Target. I stock up on the blankets when they go on sale ( last year purchased top of the line King-sized blankets for $15 which I cut down to size as needed: throw, baby, or pieced for larger! I have also purchased fleece from the roll at Hancock's and JAF... just be careful because not all fleece is the same quality! My son's favorite quilt is made from pieced denim on the front with fire-engine red fleece for the back... he loves the weight!