If the shoe fits,….

I’m not sure what I’m seeing here. This man has set up a little stand on the sidewalk beside the wall of a wat and it looks like he’s selling used sport shoes. But what are the black oblong things stacked up? Are they new soles that he can glue or stitch to a pair of shoes? They look awfully long, but then maybe he cuts them down to the shoe size. I’ll have to go by there again and see if he is still there and what he has on his stand.