Don't buy these if you want Costa-like performance. I ordered blue gray mirrored lenses and when they arrived I put them next to real Costa lenses and immediately realized that they actually have a brown or amber base, much higher light transmission and horrible back reflections compared to Costa lenses. . . Costa will replace my lenses for about twice the price and the quality of the lenses will be 20 times better. Not sure about the installation as I put it back in the box to return. I'm giving them 2 stars because I'm sure some people could use them to replace broken or scratched lenses without caring about the quality. As for me, the only thing I would have was a pair of sunglasses that I hated and wouldn't wear. I added 3 photos. One is a comparison with a Costa lens that is not included. One with a beautiful dark gray Costa lens, the other with a brown, lighter Lenzflip lens.
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