retro style with a wide field of vision . the dx3 otg frame is designed with a focus on comfort and quality. it features lumalens colour optimization and otg compatibility. the dx3 is perfect for those who prefer goggles with a frame without sacrificing comfort, quality, or style.lumalens® amberthe lumalens® technology provides optimized colours and glare protection through an ionized lens coating. the hard coating is scratch-resistant and repels dirt, dust, oil, and water.light transmission 54 %