I was wondering the same thing. I have a pattern for an oven mitt that says you're suppose to sandwich one layer of Insulbrite in between two layers of Warm & Natural. Well, by the time you do all of the layering, the pile of fabric and batting is so thick it hardly fits into the machine. Plus... the pot holder or hot pad... whatever it is you're making is so stiff it's hard to use. So, I'm really confused on this one. I certainly don't want anyone to burn themselves but at the same time, if something is so thick you can't use it, what good is it?