Dragon EnduroX Sunglasses Transition lenses' photochromatic technology is designed to maintain optimum light level in all conditions. Lens tint adapts automatically as light changes around you. Light weight injected TR90 frame material with integrated frame ventilation for maximum air flow Comes with extra set of lenses for night/low light activities Sealed multi layer dual sided lens coating is hydrophobic oil-repellent fog-resistant and anti-smudge Interchangable C-Temple system: Equipped with interchangable cable temple attachments for secure fit in extreme conditions