Well, to spot them, there are some ways you can have a try. The most common and best way is to check the label. First, you should know that they are made in china. So you can check the label which should be written with the words "made in china". Also, you can check the warranty. And you could also take them to some official stores so they can give you professional advices. Also, you should know that Under Armour Sunglasses are made for men, women, small faces, big faces. So they have different types which you can choose from. In addition, the polarized lenses are tough against impact and designed to present a non-distorted, glare-free range of vision. They are well known by many people because they are lightweight, and have contoured designs.