[EricH]

It's not a question of whether it can stop a paintball. It's not a question of whether you can see through it well enough. It's not a question of whether it can take a hit with a paintball better than safety glasses can.

It's a question of whether or not it meets FIRST requirements. FIRST requirements happen to include ANSI approval. You find something that tells me (and your safety judges) that it's ANSI-approved, you can wear it. If you can't find that, you have to wear safety glasses along with it. That's what the FIRST manuals (plural in this case--Administrative and Safety) say.