I used some really pretty faux leather (AKA Vinyl) I found for cheap-o at Joann Fabrics. It's gold, and crackly, and looks luxe to me. Pretty easy to sew with because it's soft on the back side, so it slides easily on the sewing machine.
HOWEVER----- you WILL want to use a walking foot when sewing for ease, because I did experience some issues when using my regular foot. Not always, it seems to bunch only at the beginning of stitching, but when I used my walking foot there were ZERO issues.
This is a walking foot:
First press out like this: