These glasses are great - They wrap around slightly which helps to block the light from the sides. The style is great; a classic that won't be passe with the next trend. I wear these for driving, beach, and casual wear. My eyes are rather sensitive to light, and I find that the tint is dark enough. I run, but I prefer to sweat in a cheaper pair of sunglasses, although I've noticed these fit so securely, I am sure I can run in them without a problem.