You and Fusion make a great pair. You’re both tough, flexible and unbeatable! This is a unique model, technically advanced and fully adjustable. Low weight and fitted with Jawbone technology. Adjustable nose pad and temple tips provide superior comfort. The large, ventilated cylindrical lens maximizes your field of view. Fusion Nano Optics Photochromic is equipped with a photochromic lens that automatically adjusts the darkness of the lens to the strength of the sunlight (UV light). The stronger the sun, the darker the lens to keep you performing at your best no matter the conditions. The lens ranges between categories 1-3 depending on the weather conditions. In addition, the lens has minimal distortion and integrated anti-fog properties.