The Oakley Gascans are a popular type of designer, polarized sunglasses manufactured by Oakley, Inc. Like all of Oakley's sunglasses, the Gascans are engineered to block 100% of ultraviolet light and blue light. Blue light is the intense glare of light that reflects off water or snow. Knowing how to spot a pair of fake Oakley Gascans will help you avoid spending money on inferior sunglasses that bear the Oakley trademark.

Visit the official Oakley website and compare the colors of the Oakley Gascans to the ones depicted on the official website. The frames of the counterfeit Oakley Gascans will often have a lighter shade of color than true Gascans.

Examine the inside frame of the Oakley Gascans. An original Gascan will have the words “Made in U.S.A” embossed. All original Oakley sunglasses are made in the United States, not in Taiwan or China.

Look the Oakley logo of the Gascan. An original Gascan will have a raised squared version of the "O" logo on the frame arms. A fake Gascan will often have a painted logo that can be easily scratched off.

Feel the nose piece of the sunglasses. An authentic Gascan nose piece is made out of high quality rubber that is soft and sticky when you touch it. It will also have an authentic logo printed on it that is hard to rub off. A counterfeit Gascan will have a nose piece that is of low quality rubber or hard plastic that is somewhat glossy with a logo that is easy to rub off.

Look for a serial number printed on the frame. Authentic Oakley Gascans will have a serial number printed in the inside of the frame while a fake one will not.