clarity, versatility and style - the dragon nfx2 goggle. the swiftlock technology of the nfx2 allows you to change the goggles' lenses as quickly and securely as ever before. this technology is worth its weight in gold, especially on days with changing weather conditions. the frame is airtight with the lens, which also has an anti-fog coating for a clear view.lumalens® purple ionlumalens® technology provides optimised colour and glare protection through an ionised lens coating. the hard coating is scratch-resistant and repels dirt, dust, oil and water.light transmission 23 %