My DH's grandmother made polyester quilts. Just 3" squares sewn together. I received one of them. Put a really nice cabbage rose sheet on the back and had it machine quilted. Made a nice sturdy quilt we used in the camper.
They don't have to be pretty but they're easy to wash and sturdy. Just turn them upside down with a nice sheet backing! Great way to use the "unwanted" polyester.