I can only think that when they do their contre-visit (medical), in Aubagne or Castel, one of the Docs noticed the state if the feet of the EVs. So now you should join up with shower slippers, if you should forget or not know about them, then you will be like everything else, issued a pair on arrival.Flip flops were non existent in our day's
What is worth noting is that an EV should not leave Aubagne (or wherever he joined up) or nowadays Castel, in a worse condition than when he joined up.
I don't mean to change the subject... but St Michel is coming up. I'm already working on a video for my traditions playlist, if anyone should like to offer a thumbnail (legion orientated) with the Arch (yes he did hold that dizzy title) Angel Michel slaying a dragon - in the air SVP , it will be considered.