highest optical quality with an unimaginable field of vision. the open xl by out of offers the highest optical quality with an unrivalled field of vision thanks to the realnoframe design.these snow goggles open a new chapter in the history of frameless snow goggles. out of's realnoframe technology allows the lens to be fixed to just two side connectors, for unparalleled speed and ease of change in all weather conditions. zeiss lenses offer the highest optical quality, especially designed for snow goggles.smoke lensthe red mci lens is a neutral tinted lens with a red multi-coating. ideal for bright and sunny days.filter category: 3transmittance of visible light: 18 %bonus lens: persimmon the persimmon is an orange lens without coating. perfect for cloudy days and bad weather conditions.filter category: 1transmittance of visible light: 59 %