I have one pair of Oakleys and about 5 other pairs of shades.
The Oakleys are my favorites for these reasons:
*they look kick ass, I love the styling (I have A-Wires)
*the optics are great, clear and undistorted
*they fit my GIANT head really well
Over the years I have gone thru about 6 pairs of Oakelys and have only broken one pair, in a face plant off a bicycle in Mia Jima (if you must know
). The others I have just lost
There are a ton of knock offs that look "almost" like Oakelys (I have two of these) but when you get into the knock offs the optics are not nearly as good. I wish I could tell you more about UV-A and UV-B protection, but I really don't know too much about it.
Also, check out Oakely's warranty on their website .