Ski goggles with interchangeable Carl Zeiss® multi-layer lenses and second spare S1 fog lens included. Features Carl Zeiss Multilayer Mirrored Lens S3, the most sun-protective lens, recommended in sunny weather conditions or at high altitudes. Also includes one Carl Zeiss Fog Lens S1 for low visibility conditions. The extremely wide field of vision combined with multi-layered Carl Zeiss lenses create the perfect goggle for tackling challenging descents. The anti-fog treatment and upper and lower vents provide superior ventilation.