Those look like oversized orthopedic shoes with an extra big sole. Goofy lookin
There was mention a couple of months ago that he was receiving PT to make him less apt to fall & more attention was being paid to what shoes he was wearing - shortly after that, it appeared he was wearing tennis shoes a lot. On one trip, it was speculated that he had on some sort of hiking boots.
I visited a widow earlier this year - her husband took a fall on carpet and ended up with a fatal brain bleed and actually broke his neck as well. My dad fell on carpet & broke his hip, died a month later, even after successful surgery. It is VERY dangerous for FJB to be falling and that is highly likely with his issues ... old age, dementia, & the drugs used to keep him vertical & mumbling in public. If the powers-that-be want to take him out (see Tucker’s interview with Alex Jones), it will be very easy to do - FJB will just have a ‘fall’.
At this point l think they are using a double in some settings.