
I used to have a pair of Costas fantails with glass lenses. Unfortunately I just lost them so I decided to buy the same pair because I liked them so much. When I received this set from Revain it was obvious that the lenses were not glass. They weren't heavy enough to be glass, and there was no doubt that they weren't glass when tapped with a fingernail. Here is the shadow part. One lens was marked "580" instead of "580P" for the plastic version as glass. They also had a removable sticker saying they were glass on the lenses. I sent them back for a refund. Just pay attention to everyone, do your research when buying Costas and make sure you're getting a real pair, especially for the money you're spending.

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