Comments about Smith Smith Optic Threshold Graphite:
I use these sunglasses EVERYWHERE!!! I'm big into snowboarding and wakeboarding and where them all the time on the water and on the slopes. The interchangable lenses are perfect for going from high to low-light conditions on the slopes. I'm pretty rough on them and ended up snapping them over one of the right eye (bad spill...). I sent them into smith, and they replaced them for free! They're a tad expensive, but well worth it because you can wear them all the time!!