The tech21 Evo glass screen protector provides unrivalled screen protection while remaining ultra thin at just 0.4mm thickness for a seamless, crystal-clear result. The tempered glass receives a high-precision polishing and etching for a smooth finish without ridges and imperfections, which guarantees a natural feel and precision touchscreen interaction. The Evo Glass is engineered to be harder than the objects your iPhone screen will come in contact with to ensure no scratch damage can occurs. Smudges are prevented because the glass has a special coating, which is designed to repel marks.