What would be most comfortable to wear for this event?

I recommend wearing a toga

Most importantly is that you dress comfortably. You will wear a jumpsuit, helmet and tennis shoes. no jewelry and you will be blown about. that's why you need to tie hair back. They have covered hair ties and shoes if you need.

Typical sportswear. Tight fitting shoes with laces, Jean's or shorts. Tshirt. You may get sweaty, and your hair will be windblown. Leave expensive jewelry and watches at home.

Also long hair in a pony tail

Thin pants and shirt to comfortably fit under the suit

You can wear whatever you want they give you a jumpsuit to wear when you go

Leggings, thin jeans, T shirt, tie hair back and low for helmet. Gymshoes!