Blue Light Blocking: reduces eye fatigue, filtering out blue light from all the screen time our eyes receive each day Premium Polycarbonate: technology that provides a sturdier frame Anti-Scratch Aspheric Lenses: keeps lenses scratch resistant, thinner and light weight Sizing:  Lens width: 45mm Bridge: 23mm Temple: 143mm Available in 2 Colors Tortoise |Red  Tortoise | Blue LEE R-7078-C2-BLB Tortoise | Blue| Blue Light