ZAGG Smartwatch Screen Protector for Fitbit Surge - Clear Military grade components that were Originally designed to protect military helicopter blades now deliver Unmatched protection for your devices. Self-healing Nan-Memory technology is Scientifically formulated with smart molecules that heal from scratches and dings over and over. Ultimate HD clarity accentuates sharp images and vibrant colors. With a limited lifetime warranty, if your Invisible Shield HD ever gets worn or damaged, ZAGG will replace it, for the life of your Device.