I use muslin (kona cotton 200 thread count) - usually white for my backing on quilts -- it gives me the appearance I want with my quilts -- I usually do not wash fabric before quilting it and want it to have that old look and the Kona cotton muslin does that...Have had not problem with it and it feels great before and after it is washed.... And it holds up really well and I just love it.... Sometimes you can see the quilting on the front of the quilt and the back is a better picture of the quilting.