The reason we like to know what kind of material you are sewing on is that we can compensate for all of the unexpected things that stitches like to do on different materials. For instance, if you are going to be sewing on a blanket we would add extra stitches called "underlay" to make a smoother surface for the embroidery to sew on. If we do not know you are to sew the logo onto a blanket, we do not know to add the underlay. The more information we have, the better-equipped we are to provide a good product.