Birdz brand goggle and sunglass lenses are Polycarbonate. They are shatterproof, and are rated UV400 (100% UV protection). A special clear coating is applied to the lenses which blocks the ultraviolet (UV) rays. Obviously this is a transparent coating and can be applied to any color of lens including clear. The Polarized lenses are 1.1mm lenses that exceed FDA requirements for impact resistance.
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