POC DO Blade Spare Lens, Versatile Sunglasses FASHION AND FUNCTION: The Do Blade Spare Lens tints are optimized for road biking OPTIMAL FIELD OF YOU: Features the superior optical performance of Carl Zeiss lenses, treated with Ripel, for clear vision and easy cleaning CLEAR AS DAY: Perfect for partly cloudy weather and has a VLT (Visible Light Transmission) range of 10%- 91.5% FIND YOUR COLOR: The Do Blade Spare Lens is available in four colors