There are numerous fakes for sale on Ebay. After I spent $50 on a fake pair, I decided to do research to see what real ones should have. Even though the seller says that they only sell 100% authentic you should be sure to note the following major differences in fakes and authentic.

1. Revo ONLY sells polarized lenses. Revo takes huge pride in the creation of their lenses. Check out their website for the details they put into their lenses. If the seller is selling "non-polarized" Revos they are selling "Non-Revos"

2. New Revo lenses have a small printed logo in the top left corner of the left lens. Counterfeit do not.