The Coast Sunglasses from Bloc offer a sophistic sculptured modern take on a classic style. The Lens XTR Karbon8, Graduated Brown. This Cat 3 optical Class One lens provides Maximum protection against UVA/UVB and harmful blue light up to 400nm. Distortion free and impact resistant. Tested to BS EN ISO 12312-1:2013 A lens more suited for medium bright light conditions. (Lifestyle) The Frame KARBON TX™ injected frames are hand finished. They are flexible, durable, lightweight and designed for comfort and fit. The Spec Laser etched branding. XTR Karbon8 Lens KARBON TX™ injected frames Suitable for Small to medium faces Lens: Brown Graduated - Cat.3 Colour: Brown/White