Smith Optics PivLock V2
The PivLock V2's have a very effective design: One lens piece with a removable nosepiece and temples attached.
These glasses practically disappear when worn, not only from the weight but the fact that the earpieces or any element of the frame is not visible when worn. My biggest complaint about the Oakley Jawbones is the blind spots created by the edges of the frame in the bottom right/left corners as well as the earpieces. Your peripheral vision is completely unihibited by Smith's design.
It always seems like my bike computer is situated just where the lower frame of my glasses sits, so I normally can’t just shift my eyes downward to check speed or distance. I also can't shift my eyes up to glance further down the road when in an aggressive position such as a TT bike because of the upper frame. The nosepiece, which is made out of hydrophilic Megol ( along with the replaceable temple pads), have a 3-position adjustment so you can comfortably fit them to your face.
I honestly never gave much thought to the nose piece of any glasses, well other than when Oakley came out with their "Asian-fit" glasses 10 years ago. The more I thought about it the more I realized that there is quite some variety in nose width to justify an adjustable nosepiece. Once I tried the different positions of the adjustable nose piece I realized there was another level of fit that I had not obtained with other glasses. The Megol compound on the temple pads and nosepiece ensures that they will stay put.