ZAGG InvisibleShield HD Screen Protector for Samsung Galaxy Tab 4 (7" Screen) Advanced Clarity: Ultimate HD clarity combines with a glass-like surface for protection that looks as good as it feels. Military Grade: Powerful components, designed to protect military helicopter blades, deliver unmatched impact and break protection. Self-Healing: Nano-Memory Technology: Scientifically formulated with smart molecules to heal from scratches and dings over and over. Lifetime Guarantee: If your InvisibleShield HD ever gets worn or damaged, ZAGG will replace it for as long as you own your device.