My Grandma made crocheted rugs out of fabric and even bread bags. She taught me how to make them and I didn't even know I was crocheting, just knew that is how you make rugs. When I was in college she would sew the fabric strips together and roll into balls. When I came home she would give me a bag of rag balls. I ended up with a rug so big that I had to sit on the floor to crochet around it.
I agree that they are heavy. When I dumped a fryer of grease on mine, it went to the dump. Too big and heavy to even try to clean. Have fun.