I bought a pair of 8307-10's (silver carbon fiber / polarized lens) through Amazon after trying on a pair at an optician and liking the lens and frame. A year later, I have reservations.

This is a great pair of sunglasses for driving and general wear. A gradient lens means the tint is darker at the top and lighter at the bottom. This allows you to see details more easily of close-up objects (like a dashboard) because the lens lets in more light lower on the glass. This design however, has a drawback. It is not dark enough under full glare. If you are at the beach or out during a sunny snow covered days, you will need a darker lens.

Additionally, the lens use mirror finish. While it protects the lens from scratching, it makes the wearer look like a tool. There's a South Park episode where Cartman dawns a pair of mirrored sunglasses and then shouts at everyone: "You will respect my ah-thor-ah-tay!" The mirror on these glasses is pronounced enough that it just shouts: "Hello 1980's police drama, here are your sunglasses!"

Finally, you have little ability to adjust the frames. Metal and nylon frames allow you to tweak them throughout the frame to fit the wearer's face. I'm not sure why other reviewers claim this to be a flexible frame- it is NOT. Carbon fiber is unidirectional. Bend it and it will crack. Your optician can adjust the temples (at the hinges) and nose piece but nothing else. Since the earpieces can't be molded closer to my head, the glasses ride forward off the nose and constantly need to be pushed back. Because of this, these frames are not suitable for any athletics, including low impact sports.

In conclusion- I only use these sunglasses when driving. The polarization cuts road glare well and I appreciate the ability to see the dashboard so easily. Ray Ban continues to be the industry leader in designing lenses which keep color transmission true- and this lens is no exception. The Aviator Frame is a classic look and  the teardrop lens shape complements most face shapes. (Personally, I feel the smaller frames look great on women's faces.) That said though, once I'm out of the car I swap them out.

Respectfully, Seacoast New Hampshire