[EricH]

I'm with tim-tim. They just don't seem that they'd have enough protection. However, I'm not a safety advisor.

If I were you, I'd bring along an extra pair of "normal" shoes. Talk to the safety judges (green polos) at some point early Thursday. If they say that those are closed-toe shoes, you're good. If they say that they aren't, go to the stands, put on your other pair of shoes, and return to the pits.