I started wearing my new VFFs to work because the dress code allows "sports shoes". A few other guys also wear theirs; however our new boss's boss who's only been here for a couple weeks decided that we're not allowed to wear them anymore because she thought they were creepy.
I had an appointment with my doctor for just a normal checkup and I decided to tell her that since I started wearing them, my chronic back-pain had diminished quite a bit; and how our boss won't let me wear them, she was interested that they were helping me so she wrote me a note saying that she wants me to continue wearing them at work.
So I came to work the next day with note in-hand, I politely asked for a moment of her time. I explained that the help my back pain and that my doctor suggested that I should be allowed to wear them, I gave her the note and she accepted it.