The Serengetireg Sport Collection are the kind of sunglasses that are always up for any adventure. They are lightweight and sleek without sacrificing a trace of our signature technology. 555nm Lens Ideal for bright light conditions, the 555nm lens manages yellow and green light transmissions to cool and relax the eyes. The light silver mirror coating further reduces eyestrain by acting as a protective shield against glare. Base Curve 8 Rx Temple Length 130mmSpring Hinges Lens Size 60 x 38 x 62mm, DBL 16mm Frame Shiny Gunmetal Lens 555nm Polarized