QUAERITUR: sandals

From a reader:

When I was on vacation at Lookout Mountain, Georgia USA, I saw the
Priest wearing SANDALS with his vestments. Yeah – that surprised me,
too! Is this normal?

Shoes are rather new-fangled inventions, actually.

And there are many priests who belong to religious orders which require that they be “discalced… shoeless”.  They generally wear sandals.

I would instead focus on what the priest is doing during Holy Mass.