Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
It's a glass screen. There is nothing to protect unless you have wear a ginormous diamond ring and your hands keep slipping. Don't fall prey to all the worthless "protection" accessories. Treat your MBP with reasonable care and it will look new for its useful lifetime.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.