There is empirical evidence face coverings (of basically any fabric) reduce transmission rates. It's not like a respirator where there's a testing guarantee tha

There is empirical evidence face coverings (of basically any fabric) reduce transmission rates. It's not like a respirator where there's a testing guarantee that if you're in an atmosphere full of infectious agents you'll be fine, but spreading or catching a virus is a game of probabilities and masks reduce those probabilities.