The Ri-Pel hydrophobic and oleophobic treatment protects from dirt, water, sweat, salt, oil and dust, and also makes the lenses easier to clean so your vision is always cleaFeatures:Extra Lens: - An extra Clarity No Mirror Lens for low light conditions is included.Cylindrical Lens:- The cylindrical lens sits an even distance from the face for minimal optical distortion.Clarity:- The supplied lens features Clarity technology for all-day, all-mountain performance.Spektris mirror:- The unique Spektris mirror coating is engineered for perfect harmony with the Clarity lens base tint for an enhanced visual experience in specific light conditions.Cylindrical Lens:- The cylindrical lens sits an even distance from the face for minimal optical distortion.Anti-scratch treatment:- An anti-scratch treatment on the outer lens reduces the risk of surface damage for clearer vision.Anti-fog treatment:- An anti-fog treatment on the inner lens helps reduce internal fogging for clear vision as the intensity rises.