The F/A working in business on AA142 in early Jan was in black UGG boots...and it wasn't all that cold or snowy in NYC for departure, she must have been schvitzing when we landed in London as it was in the 50'sF. They may have been comfy for her to wear, but it looked terrible as they were quite worn and stained.
I get what Pucci says are uniform standards...true, we aren't in the days of white gloves anymore, but then again, as much as I'd love to wear comfy slippers at work, I doubt I'd get away with it.