The cu sidhe boots
sort of have a property, allowing humans to ride a doggie... but yeah, can't think of any footwear that would have any real item properties on it. Wouldn't be too bad, though we'd need several options or we end up with something everyone will wear 'cause you don't lose any slots because of it.
Think lucky robes or crimsons, they take up no slot from anything else so naturally they're good for anyone to wear all the time (okay fine, vet robes, but come on).
The game also needs a decent pair of FMBs, the thigh boots are almost there but not quite. Not enough heel, not enough laces