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1. The sunglasses should provide protection from ultraviolet radiation. The glasses should have 100% UV protection. 2. The lens material can be polycarbonate, a lightweight durable plastic or a special plastic used mostly in prescription grade lenses. The material can also be glass, but the lenses are much heavier. 3. Lenses come in various colors. A changeable lens system allows you to use dark lenses for sunny conditions and yellow or orange for low light conditions. A grey lens is good on sunny, bright days. On cloudy days go with the amber lens. 4. Good quality lenses should be scratch resistant. 5. Frames can be made from plastic, coated wire, titanium and other materials. Frames should be lightweight and sturdy. 6. Look for adjustable temples. Choose sunglasses that fit properly, are stylish and provide proper eye
protection. Major sunglass marketers that offer quality sunglasses are Adidas, Bolle, Callaway, Nike, NYX and Oakley.
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