I made one for a co-worker's daughter once. After reading all about them I found out that linen makes the best one. They say not to use a "stretchy" fabric as it stretches too much when baby is in it. But I'm not sure about that. Seems like they come in all different sorts of fabrics. I don't know how much she used it but it was something that she really wanted. It's the one & only thing I've ever made that I got paid for. It did take a lot of yardage.