Our Cabo glasses feature a sporty style mens medium frame with PC frames and TAC polarized lenses. The rubber nose pads and rubber non-slip temple grips create a snug fit even when perspiring. Your order arrives packaged in a microfiber pouch which doubles as a cleaning cloth. PC is a frame construction made of Polycarbonates, a particular group of thermoplastic polymers. It also has trademark names like Lexan and Makroclear. These frames are lightweight, flexible, and are commonly used in sunglass construction. TAC is the acronym for Tri Acetate Cellulose used in lens construction. These lenses are comprised of a scratch resistant plastic and block out 99% of all UV rays up to 400 nanometers. Shiny Black frames are one of the most popular frame colors in sunglasses and are never out of style. Smoke lenses keep colors neutral while the medium to dark gray, smoke tint blocks the sunlight. This results in less light reaching the eyes and makes bright sunlight easy on the eyes.