UV Protection Category: 3. Lens Type: Mirror. Polycarbonate: Polycarbonate is lightweight, comfortable, impact resistant, and provides UV protection. KARBON TX™ bi-core injected frames are hand finished. They are flexible, durable, lightweight and designed for comfort, fit and performance. The sports hinge provides both strength and performance. The fully adjustable hypoallergenic nose pads and the non-slip hypoallergenic temple tips are designed for comfort and fit. XTR Karbon8, 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 high protection lens more suited for bright conditions.