Ray-Ban Sunglasses 8304 Light Carbon Polarized Grey Mirror Silver Gradient 002/71 are from the new Ray-Ban Carbon Fibre Collection which combines classic Ray-Ban designs with the latest in material technology to bring the Ray-Ban range bang up to date. Carbon frames are of course incredibly lightweight but also flexible, highly resistant and strong. The lenses also have been upgraded with hydro-oleophobic coatings and chemically hardened to withstand anything you can throw at them literally! The end-pieces have also been rubber-injected giving extra grip and the bridge is flexibly like the rest of the frame to be adjusted for the perfect fit. All in all high quality pervades throughout and completely worth the upgraded prices! This particular model the Rayban Tech 8304 is a rimless design making them incredibly lightweight and with a great all round vision.