Question about using sweatshirt for backing
I am making a "cheater quilt" for my sister for Christmas. I call it a cheater quilt because there will be virtually no piecing - just a fabric panel for the front (same fabric only pieced to make the width correct) and a solid panel for the back. My question is about the sweatshirt fabric that I am using for the backing. Its is a solid panel described as "polyester sweatshirt". It does have some stretch to it. Will I need to put interfacing on this - or will it be fine as is since I am not piecing anything. I will just quilt the 2 layers together and then bind. I probably won't even use batting. What do you guys think?