Well, first, you should know that they are made in china. Also, this is also the most common and best way which is used to spot the fake ones. Generally speaking, if they are authentic, you will find the label which should be written with the words "made in china". By the way, 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. Besides, they are UV protected, so they can protect you from the UV rays and sunlight.