I would use Beacon Fabric-Tac Permanent Adhesive. Add some stitching for decorative elements. This glue is fast drying and will not come off....ever! I have learned from experience when TSA threw it back into my suitcase without putting it back in the plastic bag. I used it in place of sewing machines when traveling internationally. It's a bit pricey compared to other fabric glues, but it's the best I have found.