Zagg InvisibleSHIELD for Acer Iconia Tab A500 (Screen) (ACEICOA500S) Scratch-Proof - patented film - Military Grade Lifetime Guarantee No added bulk - Improves grip Invisible protection Easy to remove - leaving no sticky residue Scratch-Proof, patented film. Military Grade. Lifetime Guarantee. No added bulk. Improves grip. Invisible protection.