Hi,
I just bought this item yesterday at the motorcycle shop and used it today for the first time. Since it was sunny out at times it turned out to be very useful and well worth the money. It is called the "Sundowner" and it is a strip of plastic that helps block the sun and glare. But what I found out is that it helps block the glare and the "brightness" of the sun. It seems I won't need to wear sun glasses anymore as long as i wear my helmet with a shield.
When you position this you are not to use this item like sunglasses but place it towards the top so it screens the brightness or glare from you. Since it is about 2" from your face it is kind of like the brill of a hat that keeps the sun out of your eyes.
There are a few things that are really nice about this:
1) The price was only about $5.
2) It works very well if placed properly.
3) It can be re-postioned and also transferred from one helmet to another.
Here is a picture of the item and a picture of the "Tag".