I've been working on a project with an inventor that requires a foldable shoe. If I tell you about it, I'll have to kill you. It's TOP SECRET - very hush, hush. What can I share with you? It has prompted me to re-visit and research various options. These are nothing new. I remember my mom having them as evening shoes when I was a child. These were not shoes for the pocket. They had a leather sole and 1/2" heel. The heel folded into the toe and the shoes were in a clear plastic bag that was merchandised on a hanging rack in department stores. I remember a pair my mom had vividly as royal blue and gold brocade with a squared off pointed toe. Here's similar style I found through a Google Image search. In recent years, the foldable ballet flat has been in vogue. These are available at various price points. CVS had a great, inexpensive rollable model that everyone I know loved. For some reason, they have discontinued the product. Dr. Scholl's offers Fast Flats. AliExpress has lots of choices. H&M offered some styles several years ago and of course there is the Ballasox by Corso Como. This is a versatile product and the styles offered are getting more varied and fashionable. Many are even weather proof - perfect for those April showers. Find your special pair now.