I am in the process of quilting my "sandwich" now. Because I wanted a really warm quilt, I used cotton for the top, warm and natural for the batting, a layer of flannel for extra warmth and then flannel for backing. I found out from Fabricland (Canada) that they sell a good quality flannel for lining drapery which is really inexpensive so I used that as the inner batting. I spray basted each layer and it is working out well.