The lenses of these glasses offer solid protection with their cat3 darkness level and polarization, which reduces glare from the surface of water or snow. - Lens: Polarizing, visible light transmission 11%, gold mirror - The inner surface of the lens has an anti-fog treatment - Shaped Grip Tech pads on the temples - Air Flow ventilation - Flexible nose pad - Removable side guards - Size M frame: - Lens Height (mm) : 43 - Bridge Distance (mm) : 17 - Temple Length (mm) : 120 - Base : 6 - Lens Size (mm) : 54 Julbo has been making sunglasses for more than 135 years. By buying Julbo, you are investing in a quality product and can rest assured the glasses offer perfect UV protection.