Sunglass Holder
This unit clips to the sunvisor of your car. It works relatively well, but needs to have a more secure closure when sunglasses are inserted. I had to attach Velcro strips to keep it closed.

Poor design
I was hoping to use only one hand to secure or release my sunglasses, but it doesn't work that way. The cover is not spring loaded, so when facing down on the visor it tends to open by itself. My sunglasses are not too big, but they don't fit well in this holder.

not for my glasses
I got this item hoping that my "car sunglasses" (never drive without them) will be in one spot and easy to find in my car. Unfortunately they're too big for this holder. I guess it's for glasses with very thin rims.