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These authentic Costa Del Mar Blackfin Polarized BL 70 OGP polarized sunglasses with Gunstock Brown Nylon frames shield eyes from damaging UV (ultraviolet) radiation and reduce disabling or blinding surface glare, making them particularly useful for boating, driving, and other outdoor activities.
Gray lenses excel when the forecast calls for bright, sunny skies. They are dark enough to reduce eye fatigue and increase eye comfort under intense light conditions but not so dark that they impair vision when clouds obscure the sun. Since they don't change the value of color, they enable the wearer to view scenes in their most natural state. For deep-water fishing, wear gray lenses for maximum glare reduction.