Dirty Dog Astro Polarised Sunglasses - Silver/Silver Mirror   Blocks horizontally reflected glare. Ideal for boating, fishing and driving Scratch and shatter resistant Distortion free for maximum clarity of vision Protects your eyes from harmful UV rays Exceeds world-wide standards   Dirty Dog use metal frames of extremely high quality which is guaranteed by their sophisticated electroplating and powder coating technologies in combination with epoxy coatings. This offers high grade resistance to oxidation and corrosion, resulting in frames that will outlast many others. The strong yet lightweight material provides superior durability and comfort for the wearer. Frames are tested rigorously to ensure they pass the high standards set by Dirty Dog. Equipped with the latest lens technology in POLARISED POLYFILTER lenses. Scientifically formulated to offer exceptional defence against the suns harmful rays, our POLARISED lenses absorb radiation that can be damaging to the human eye. These lenses provide clear and restful vision in the most extreme environmental conditions offering optimum glare and UV protection. Dirty Dog Polarised lenses block reflected horizontal glare making them the perfect choice for any high glare situations like fishing, boating, skiing, driving or any situation where you need extra protection from reflected glare.