I'm a big appliqué quilter and started out withWonder Under but now use Heat and Bond. There is a lightweight and heavyweight. I have found though especially with Wonder Under if you buy on sale it doesn't stay for several months as it loses its stickiness. That is mostly the reason I changed to another product even though it's hard to pass up when on sale and using a coupon at Joann's. Also the best way to store is rolled and upright, I put mine on a stand up paper towel holder.