Our Small Kat sunglasses are a small round style with the popular keyhole style bridge. Featuring TR90 frames, TAC polarized lenses in classic and funky colors. Your order arrives packaged in a microfiber pouch which doubles as a cleaning cloth. TR90 is a super-polymer compound that is extremely lightweight, incredibly sturdy, but very flexible. 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 Crystal Teal frames offer a beautiful look with an even tint throughout. The translucent teal color is added during the liquid stage and injected directly into the mold. 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.