What do you call this kind of screen protector?

So what do you call the screen protector for the iPhone 4s which only covers the screen, not the bottom part where the home button is and not the top part where the camera is on the front. It's because I have a decal skin on it and most screen protectors I found cover the entire front face which is inconvenient in this case.

:) maybe you need to buy a new one. My brother used to buy a fashion durable cases at iapplefun.com, you can browse the site and choose one.