ZAGGs invisibleSHIELD is an exceptionally clear and virtually indestructible film that will protect your HTC EVO 3D from unsightly scratches. Our exclusive, patented film - with nano-memory technology - covers and shields your device, keeping it as pristine as the day you took it out of the box. It is so tough that we back it with a lifetime guarantee. So, if it ever does wear or scratch, we will replace it for free, for the life of your device.