Kaenon Kore Rocks!
I work outdoors about 6 days a week and my Kore's are the only pair of sunglasses that I can wear all day long(I also own Arnette, Maui Jim and Hobie too). They are very comfortable and do stay put for the most part. Clarity is excellent and the polarization(blk-12 lens) keeps my sensitive eyes from squinting. The only problem I've had w/ the sunglasses is that both ear pads slide off. It's not really a problem if I don't take them off constantly. I purchased them from a friend for cheap, so I can't really complaint. Kaenon puts out a nice product. I also own 2 pairs of Kaenon Rhinos.