Where can I find the serial number of my sunglasses?
Remove the nose piece of your optray sunglasses with a twisting motion, holding the nose piece on both sides of the lens.
On the outside of the lens where the nose piece was, on the right, you will find the serial number.
Where can I find the serial number of my goggles?
On the inside of the goggles, on the right side, you will find the serial number.