I love the fact that Smith has interchangeable lenses. This is huge when you are dealing with different times of the day. as far as these glasses go, much better than the Slider 01 series. The lenses are easier to take in and out, and seems like they are most stable. When these glasses sit on your face, they just take over. They are light, and wrap completely around my odd shaped head. They stick to my face even when I am sweating a lot. They come with a nice case with 3 extra colored lenses. I would recommend these glasses to anyone who is into Biking, hiking, or any outdoor sports. I will never go with another brand but Smith......Oakley--never again!!