My Mom used anything she could get her hands on for quilt batting, old polyester blankets that had worn areas were cut and pieced together, old quilts, flannel, just anything. On my next trip to WalMart I am going to buy a polyester blanket for $10.00 and use it for the back and batting on a log cabin quilt that I plan on tying with embrodery thread. I just cant afford batting and backing now and with binding I think this will make a neat quilt.
I have done this on baby and lap quilts and people have loved them.