feline fanatic, thanks. I have always heard no sheets for backing but now that I am retired living on social security (that's a joke) I couldn't figure out how to buy backing material. I squirrelled away enough fabric for tops to last as long as I will (at least I hope I can use it all up) but didn't think about getting a generic fabric that I could use on backs. I never wash my material first so I would need to buy new sheets which would still cost less than material, I think. I am definitely going to check that out.