I have no problems with this product. I can't really _not_ rationalize giving the product five stars for my intended use. The materials are very good and the product is durable. At a reasonable price, I use them on my most expensive sunglasses. Maybe it's overkill for cheap sunglasses, but I'm not sure you can get something much cheaper per unit. Of course you can also use them with normal glasses. I would venture to say that men or women can use them, but women may find them a little "clunkier" than the alternatives. .But as long as you agree with it.
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