I bought the range with the c4 lenses. I was amazed at the quality for the price. I’ve bought a lot of $150-300 sunglasses before and these are every bit as nice and stylish. I chose c4 because I’m in a sunny desert climate and work outside. They are dark. To dark to the point I wear them on my head most the day. This isn’t any fault of the companies, I made wrong choice for my application. I do a lot of work on my phone and I can’t see screen while wearing them. If the sun is In your eyes all day and your trying to block it, these rock. But if you like seeing while driving, using your phone, ect my advice is get the c3. Other than that they are great, in fact I’m ordering another pair with the silver lens