Smith PIVLock Sunnies
These are awesome sunnies. The Lenses are fantastic, and you get THREE pairs of them! Clear, pink, and dark. They are so light, and so clear to look through, that you often forget that you are wearing them. I have often started to look for my sunglasses, then realise I am wearing them already. There is no frame to obstruct your vision, so I would say they are a perfect pair of sunglasses for on the bike.
Very innovative way of interchanging lenses too, to minimise frame and maximise vision.