Skinomi Tech Glass
Skinomi is probably the most popular brand from our list today, and their excellent screen protector is made from glass, durable, and also thin. It comes in at only .33mm thick so you'll barely notice it's installed, and Oleophobic coating keeps fingerprints, smudges, and grease from your hands from appearing all over the screen.
Many screen protectors don't have this coating, which is something most phones have out of the box, and screens quickly become slimy or dirty. That isn't the case with Skinomi's tech glass. Get one today and protect your LG G4.