a new frameless goggle in the dragon line. the new dragon r1 otg goggle takes optical quality to a whole new level, especially for spectacle wearers. the construction allows you to wear your spectacles under your goggles, while the armoured ventilation prevents both from fogging up. the combination with optimised dragon lumalens® lenses sets a new standard for what a goggle can do.lumalens® flash blue lumalens® 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: 48 %bonus lens lumalens® dark smokethe dark smoke lens offers perfect protection in changeable conditions. reduces glare, increases contrast and prevents premature eye fatigue in overcast conditions.transmittance of visible light: 23 %