After using for a while, this is the best protection against Arizona's sun.
I bike with this during the summer and the sun does not bother me at all. This visor really covers all your face (front and sides, forehead and chins) and stays put even under windy situations. Since the masks is close to your face the wind won't blow it. At the same time, you have enough ventilation coming from the sides and below your neck , so you won't smell your own sweat as it happens with uv protecting masks.