Just a friendly WARNING to anyone considering these:
While they work well to protect your plate and sticker, they have been made ILLEGAL in the state of Illinois. (Ironic that the sample photo shows one with an Illinois plate behind it!) Tinted covers have been illegal for some time here in IL, but the clear ones were recently added to the forbidden list.
The reason it was made illegal, according to the nice officer who provided me with a "written warning" instead of a ticket, is because of those "stealth" covers that block photo enforcement efforts, etc. Since it is difficult to determine which covers are those type and which aren't, the state of Illinois took the rather draconian step of outlawing ALL such plate covers. Sigh...
Bottom line: As the saying goes, "check your local laws." Is keeping your plate clean worth the potential fine (IF it's illegal in your area)? In my case ... nope.