Good quality flannel is a must. I use good quality flannel sheets, usually Portuguese flannel found at my favorite thrift store, for my rag quilts. If the flannel sheet still looks and feels good at the thrift store, then it comes home with me. Really good LQS flannel is spendy, so buy the best you can. I don't feel that Joanne's flannel is of the quality and weight that I would use.