Hii freinds this is from my own experience of using the ray ban this is amazing sunglass. I have a glass and I have used it for a long as they as good as new still now. they have a good frame and its strong that wont break so easily as the other glass frames so we can use as we like it. the glass is so clear as that gives the clean image of the suroundings we can get good view through the glass. the company produce so many variety of styles of glass according to the generation. they wont make us regret after buying a glass as the product is realy worthy of our money. the sun cant give strain to your eays. I use it while driving through the highways when the sun is hot . the road is clear to me as iam driving the bike.