I know this is a very strange question, but I had a sunglass rep tell everyone in my office this. No one questioned it, but I am very skeptical. She told us that inexpensive sunglasses (she said under $40.00 retail) often have a spray on UV filter that washes away in 5 or so washes. She says the US has the weakest laws in the world concerning UV in sunglasses.

This seems competely off the wall to me. I didn't want to say anything at the time....but is there any truth to this? Where did she get this from?