DESIGN: Lens tints are engineered to offer the best combination of light filtering, color balance and visual contrast Comprehensive array of performance lenses that match specially engineered base tints with IRIDIUM(R) coatings Designed to precisely tune, contrast and balance light transmission Use care when installing/removing accessory lenses Patented High Definition Optics(R) eliminate distortion for a clearer, sharper vision Light transmission: 90% Light conditions: snow and overcast Contrast: neutral Base lens color: clear