Found these lenses to be a great replacement for my Gascan frames. The only thing I advise is not to wear them to the beach. I learned the hard way that salt water as well as the rain will erode the outer blue coating. It started to rain while at the beach and I had the sunglasses on top of my head and the next thing I know I look and half of the blue on the lenses is gone. Once the blue outer layer is gone it is difficult to see through the lenses. Otherwise good lenses.