Sorry if I offend anyone with what I'm about to say (no worse than what others have said but just warning you....)

I PERSONALLY think those window sock sunshades should be banned. I had one at some stage & found it blocked my blind spot when checking it & it was really bad in the rain, maybe from sticking to the window when wet but I could hardly see through it. I think its just an accident waiting to happen.
I much prefer the little ones that either stick to the window or slip over the top of the window (a little clip)

As I said, JMO but I will NEVER use them again, big waste of money in my case.

Just out of curiousity....How do others see through them so easily? Checking your blind spot should be done in just a glance & I certainly couldn't see enough through it in a glance, would have to take a few seconds which means my eyes off the road for a few seconds (not very safe at all!)
Just curious...