i use what ever scraps of batting i have on hand to line any totes/purses. sometimes i just add any regular paper backed fusable i have on hand, sometimes i use a basting spray, sometimes i just baste and quilt. if i don't want the thickness of the batting i use a layer of muslin or flannel...you do not have to use just one particular product...it goes along with the recipe that says use 4 idaho potatoes...ya know, Michigan potatoes are going to work just as well; remember one of the great things about quilting is using what is available and making wonderful items out of left=overs.