The photochromic polycarbonate lens offers crystal clear vision under varying light conditions, while the anti-fog vented lens provides maximum airflow and circulation preventing moisture buildup on the inside of the lens. They have also added an anti-reflective coating to the lens surface so that vision remains crisp and clear at all times. The frame is designed and manufactured using the highest quality lightweight, flexible and durable materials and they incorporate the tactilite anti-slip rubber components so that your frame stays firmly in place providing a safe and comfortable experience while taking on the most rugged terrain.