Polarizing Filter, Ultraviolet. Enhancement of Natural Color. The CPL Filter significantly improves contrast and saturated tones, providing vibrant colors in your photographs. The imported polarizing lens eliminates 99.9% of reflections from non-metallic surfaces, offering HD Visual Experiences & Low Light Reflection. 30 Layers of Multi-Resistant Coatings. Ultra-thin frame & Smooth Torque. The ultra-thin 5.9mm frame is designed with a magnesium alloy.