Polarized Clip-on Flip-ups, flip it up and down as you need too. Can be used on clear glasses, or, if you need your sunglasses darker you can put these over you sunglass lenses. Size is 126mm wide by50mm tall. Color is Coppermax (a cross between our Kontraster and the Serengeti Driver as shown in the photo)
These sunglasses have been around many years. They are very useful and inexpensive. You simply pinch the cloth pin type clasp and slip it on to the bridge of your glasses. We have only a few of these left.