It is very common for a product shot to be built from two symmetrical halves, the product on top and a reflection on the bottom.
I tried taking shoe images like this using a mirror and some glass, but with both I got two reflection – one from the upper surface of the glass and one from the lower surface on the glass. I then tried using durable nylon to get the same effect which was nice, however the reflection image was not sharp.
Then. Came. Plexi.