I don't know. These are clearly both FFs and psyops, but this seems like a strange thing to focus on.

Looks like these are sandals or slippers, with no back on them. When I need to run in sandals, I usually end up kicking off the sandals instead of trying to keep them on. They really make it more difficult and slow you down because half of your energy is focused on keeping the sandals on your feet, instead of just running.