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CR-39 acrylic lenses, if that means anything. Here's a link with specs:

http://www.amazon.com/Costa-Del-Mar-Eliminator-Sunglasses/dp/B003C3RDW0

price dropped....

Costa Del Mar Eliminators. Great shape, no scratches. I'm not sure what the official color of these lenses is, but as you can see, it's an amber/copper color. These are perfect fishing glasses....