Sunglasses with acetate plastic frames are generally the least expensive. There are many types of acetate plastic frame materials available, the most common type being zylonite. Zylonite framescan be easily adjusted with heat and are available in a wide variety of colors. Another popular acetate plastic frame material is polycarbonate these frames are primarily associated with sport or safety glasses, and they can offer optimum impact resistance and eye protection as well.

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