Oakley's have good quality polycarbonate lenses, so they won't shatter if a rock hits you.

I wear my G.I. (government issue) prescription sunglasses, which the Navy gave me while I was assigned to Flight Deck duty.

I used to have a pair of Oakleys, but I stopped wearing them when I quit wearing contact lenses. I had four lenses for the Oakleys; clear, dark tint, yellow tint and grey tint. I gave the Oakleys away to someone who had the same frames, but didn't have the full set of lenses.