I think machine quilting is it. I made two wall hangings and used it and was only able to minimally hand embroider over it. It is VERY hard to push through the fabric that is backed with wonder under. I bought some pella LIGHT for my next project and hope that that helps some. Good luck. I know machine quilting over it is no issue at all. The few stitches I did by hand I thought my needle would go right through my finger as I pushed and pushed to get it up and into the fabric.