I have been buying oakley sunglasses for about 6 years now.  This is the 3rd pair I have bought, and they continue to impress me.  These are by far the best pair I have bought for my active lifestyle.  They don't have any rubber gripping on them or any small crevices which generally make the lenses more difficult to keep clean.  These are excellent for someone who spends alot of time outdoors.  just make sure you don't have a big head, as they can pinch your head like they do mine due to the think plastic not being very flexible.