Lens Type: MirrorPolycarbonate: Polycarbonate is lightweight| comfortable| impact resistant| and provides UV protectionKARBON TX™ injected frames are hand finished lightweight and designed for comfort| the sports hinge provides both strength and performanceThe hypoallergenic nose pads and the non-slip hypoallergenic temple tips are designed for comfort and fitXTR Karbon8| optical Class One lens provides Maximum protection against UVA/UVB and harmful blue light up to 400nmDistortion free and impact resistantTested to BS EN ISO 12312-1:2013 A high protection lens more suited for bright conditions