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: 52mm Bridge: 20mm Temple: 143mm Available in 2 Colors Black Tortoise Amber Tortoise MITCH | R-7073-C2-BLB Amber Tortoise | Blue Light