new goggles from dragon with the swiftlock 2.0 system. the rvx mag otg comes with the new swiftlock 2.0 system.dragon's ground-breaking swiftlock 2.0 has been enhanced with the power of magnets and magnetic contact points combined with the single-sided release lever to create a secure and fast solution for changing lenses. in addition, this medium frame is compatible with optical glasses.lumalens® midnightlumalens® 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.transmittance of visible light: 6 %bonus lens lumalens® violetthe violet lens offers perfect protection in poor visibility. reduces glare, increases contrast and prevents premature eye fatigue in overcast conditions.transmittance of visible light: 62 %