I am very big fan of sunglasses and like to wear different glasses.For Oakley sunglasses ,you can check out the following features.
1) Genuine Oakley sunglasses will always come in either a hard case or a soft pouch.
2)Designer sunglasses, like Oakley sunglasses, will always have a certificate of authenticity and a warranty card included with the glasses
3)The Oakley logo is on the arm of all Oakley sunglasses and is a raised O that has been embedded in the frame.
4)Authentic Oakley sunglasses will have several markings to help you determine if they are real.
5)The rubber pieces of Oakley sunglasses, particularly the nose piece, will feel soft and spongy.
6) Oakley glasses will have the highest quality construction.
By looking these feature you can decide whether the sites provides the original brand or not.