Check out this Splaff bicycle tube wallet I just picked up on Amazon. It has repurposed bike tubes on the inside and outside. My license and cards fit perfectly inside. The wallet has a good feel in my pocket, less bulky than my past wallet. The rubber is quite thick and almost seems more like a bike tire than a tube. The outer edges and sewn parts are made from hemp. I hope this wallet lasts longer than the tubes/tires on my bikes.