I am so happy to read that many of us use the dreaded poly in our quilts. One of you posted that quilts were originally made with cotton....sure, because that was what they had. I think we can use many things if the quality is there. Many old quilts were made with old clothes. I have one my Grandmother made that is made from old suits and backed with old flannel sheeting. Love that thing! It is over 70 years old and going strong.