Well, you should know that All Electric Sunglasses have the highest-grade polycarbonate lenses available and block 100% UV rays and filter out UVA, UVB, and UVC, the 3 most harmful of the sun's billion rays. Electric Sunglasses are made in Italy with the highest quality materials available to the market. So there are many tips you can take to spot the fake ones. But in my opinion, the most common and best way is to check the label. First, you should know that they are made in Italy. So you can check the label which should be written with the words "made in italy". Also, you can check the warranty. So I think it will be a good choice for you to have a try.