Cybertech Premium 9H Flex Flexible Glass Thin Glass Film (0.15mm) Screen Protector Skin for Galaxy S4 - vs. Tempered Glass Newly invented FlexGlass, better material for phone/tablet screen protector than any other material, like PET, TPU, PMMA, tempered glass, etc... Surface hardness : Same 9 H for extreme scratch resistance, but thinner than tempered glass (0.15mm thickness only). Oleophobic : resists fingerprints and other contaminants and makes the film easy to clean. Best Clarity: Anti-reflection, High Total-Transmittance and Low Haze, (better than tempered glass), Rainbow Free. Flexible Glass material, With Bubble Free Poly-silicon adhesive base, easy to apply.