Our Boca sunglasses are an aviator inspired unisex medium metal frame with TAC polarized lenses. With clear rubber nose pads and classy accents, this frame looks great on everyone. Your order arrives packaged in a microfiber pouch which doubles as a cleaning cloth. 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. Frame color:  shiny silver metal with black temple tips Lens color:  smoke Smoke lenses, the most popular, keep colors neutral while the medium to dark gray smoke tint blocks the sunlight. This results in less bright light reaching the eyes which reduces eye fatigue and minimizes glare.