Whereas you might have seen or personally used screen protectors, the thin layer of flexible plastic does an adequate job at shrugging off scratches but no where can this be compare with Spigen‘s new GLAS.t which adds another layer of glass for maximum protection.
Just 0.4mm thick, the chemically treated tempered glass adds thickness to your iPhone 4/4S whereas giving you the same feel of the touchscreen. The layer has been designed three times harder than plastic which guarantees protection from an attack from scissors or a cutter.
Moreover, if you do succeed in shattering the GLAS.t protector, it will break into thousands of little pieces. The application is really simple and applies easily without a single bubble. The protector is worth $28.