Masks are stupid. They don't even do that much. I mean, yes, they help, but they don't make a huge difference. Plus, breathing your own air is bad for you. It's toxic, and can kill your brain cells. You're supposed to breathe different air, not your own air!! Please don't start a war in the comments. I can have my opinion. Goodnight! So far, not so great. Dammit people!