My old wallet has been full of holes for a few years now, so I decided to use some vintage army canvas that I have to make myself a new one. A leather wallet would be ideal, but there's no leather shops on Maui, so canvas it is. Crude but functional.
I haven't decided if I'm going to use velcro or snaps, so for now I've just stitched down the flap edge to help keep things in place. The black nylon binding came from my old wallet; it isn't quite enough, but it works.