In reply to petralva:
The most important thing is you need shades that make you look cool of course!
Seriously though I wouldn't by Oakleys - far too expensive, Bolles etc are fine. If you go to an optician who sells sunnies they'll tell you about all the different lens properties info which not all outdoor shops are so clued up on. You can get polarisers too , but I find they make refelctions look weird and in 3D.
OE