When I started sewing (not too long ago) I made a bunch of potholders using one layer of Insulbrite. I had a potholder for 20 years that I got when I was in Pennsylvania at an Amish store (guess I should have known back then about my calling to quilt) and that potholder only had a thin piece of batting. I made Halloween, Thanksgiving and Christmas potholders. Then I read about how you need to have two layers, one Insulbrite and one regular cotton batting so I decided to not give away the potholders I made so I ditched them and made new ones with the two layers. I admit is it not as much fun this way but I know they are safer.