All the other kids would beat the snot outta you at school the next day if anyone saw you.
For the bugs I breath through the nose, then the little *******s have to fight their way down. Try a bandanna, or one of those air filter masks for bug filtering. I see loads of sweat and no air flow with the Shield Of Doom™. you'd look like a member of The Mystery Men.

What if you looked around at speed and it flipped up? I smell comedy gold.