Question about CarComfort Sun protection

As I have tinted windows with UV protection on my car, I didn't pay much attention to this unfortunately. I bought this product to provide more "shade" for my children when they want to sleep in the car.

It is primarily a shade dispenser, like those with a suction cup, not to be used permanently with the window open. That is why the UV standard does not matter, no relevant amount of UV comes through the glass.