I have worn a visor all the time when required and don’t have any problems with seeing through mine or breathing with it on. The plastic does have a life span though, as it can get scratched and needs to be treated carefully, so I am on my second visor. This one is still OK as I am more careful with it. As to the wearing a mask as well, I have been accepted everywhere wearing my visor without one including GP surgery, dentist, shops and buses. I bought mine online and they come with the plastic visor protected by packaging.