Have you thought about using minkee for backing? It's warm and very snuggley. I have made several with minkee and only used flannel for batting (washed and dried several times). You don't need much in the way of batting when using minkee or a good quality fleece. And as an added bonus - no binding! Just pull the minkee (or fleece) to the front on the quilt and use a pretty stitch to sew it down. Minkee or fleece is a lot more durable than binding.