clear visibility in all weather conditions . the anon sync goggle offers you a clear view and a super fast lens change in every situation thanks to the perceive optics and the m-fusion magnetic lens change technology. continuous ventilation ensures maximum air circulation for clear, fog-free vision.equipped with over the glass (otg) technology, the anon sync can also be worn over optical glasses.the cylindrical, injected lens shape reduces peripheral distortion and a water and oil repellent coating provides unsurpassed smudge, scratch and moisture resistance on the outer surface of the lens. this guarantees you the best performance. perceive sun bronze lensthe perceive sun bronze lenses are suitable for sunny days and slightly cloudy days. perceive lenses give you high contrast to better see the terrain. transmittance of visible light: 17 %perceive cloudy burst lensthe perceive cloudy burst lenses are suitable for very cloudy days. perceive lenses give you high contrast to better see the terrain. transmittance of visible light: 59 %