I've made a lot of denim quilts, and the problem with the stretch jeans, is when the quilt is dried. If you dry them in a hot dryer, the spandex kinda disintegrates, and leaves a rippled fabric. The spandex content is only 1%, but it still is an issue. When you have a heavy denim quilt, how would you dry it? On hot, so it won't take too long, right? So, if you do use the stretch denim, just put a label on the quilt to dry it on a low heat setting.