I want to make a snuggle sack for a cat that has mylar inside for a crinkle effect. It would have a layer of fleece, then mylar and then a cotton cat print fabric. I have tried two different ways to layer all of this and I'm not coming up with the right combination so that when I turn it there is no raw edges inside. I have done a search and nothing comes up. If anyone can help me I would be very appreciative. Carole