Made from a unique material originally created for the military to protect the leading edges of helicopter blades, the Invisible Shield offers protection that other screen protectors just can't match. All iPods come with screen protectors, so why would you want to buy another one? Well, those screen protectors are flimsy and meant to be replaced. They don't last. The Invisible Shield is more durable and permanent than any other screen protector. Each shield is designed to correspond exactly to dimensions of the screen. And the Invisible Shield isn't just for screens; full body designs for the iPod are available too.