First let me state that these fit me (personally) better than any other cycling frames I have ever owned. (endless Oakley's over my 60-year life as a cyclist) The sweat while riding channel's across the top of the frame and down the sides; a common problem I had with the Oakley 'Jacket' line-up over the years. Just as important is the air-channeling of the frames which has kept the lens from ever fogging, in any temperature, Rudy's Photochromatic 2 lens are a distinct leap above anything else I've ever used, including Oakley Prizm. The immediate transition between light and dark lens shading has literally been the saving factor from serious crashes on several occasions. My only complaint is the recent change of frame material to Reslin. It looks a bit cheap in the gloss colors, but the overall functionality overcomes this. I would recommend these all day and all night!