Look for information on the Costa website. As it turns out, green lenses are specifically designed for seeing underwater while fishing. Clarity and contrast are second to none, but it was still too bright for everyday city use in bright sunlight. I found myself squinting at the bright light. One star off just because I think the ad should have a better description for specific purposes for specific lenses. I am sending them back for gray lenses. I also took them to a sporting goods store and compared them to the ones in the suitcase. They are identical. For those who call them fakes, I don't understand how you came to that conclusion. If you dig enough, you will find that Revain is in fact an authorized seller for Costa Del Mar. Just make sure you're buying Revain-sold and Revain-delivered items.
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