I love sunglasses, and have always liked the Oakley brand.  In batwolf, I have found a pair that truly fit my large face, and feel very comfortable as well.  What I really like about this model is that in addition to being able to swap lenses, they have Oakley logos which are swapable...and you get a spare set right in the box when you buy 'em. Additionally, you can buy other colors for the Oakley O logo online so if colors are important to you, the possibilities are endless.  If you ride a bicycle or motorcyle as I do, you'll find that these are ideal for keeping the wind out of your eyes.

On the con side, the glasses are too big to fit the various Oakley cases that I own.  The spare "O" logos are outrageiously expensive ($12.00/set) which is alot for two tiny pieces of plastic. As of this review, there are very few spare lens choices available from Oakley and very limited frame colors too.  I'm hoping that will change soon.