Get one for your grandparents! They should have had their licenses revoked years ago, but at least you’re helping them stay safe.
It also reduces that annoying glare of headlights from behind you. You know what I’m talking about. You’re driving along, and some jerk is following too closely. Their headlights end up blinding you. Well, that won’t be as much of a problem anymore!
It’s easy to put on too. So, if you’re like me and have trouble with stuff like that, you don’t need to worry.