The only choice for polarized glasses
I've been very impressed with every Kaenon product I've used. The quality of the optics is unmatched. I've used polarized products from other manufacturers and these are by far the best for all-around use. In fact, every other brand's polarization isn't wearable for day-to-day use because of the rainbow effect and other distortions--not so with Kaenon. I've got the gloss black frames with the SR91 grey lenses and they provide the perfect casual look.
The only downer is they don't stay on top of my head very well when I place them there... gotta be careful when in the restroom or they might drop in the drink. And since these aren't really athletic glasses (get the Kore's for that), the lack of rubber on the temples is OK.