OVERVIEW EFM TT Sapphire screen armour is constructed from 5 specialised layers for maximum screen protection and usability. Featuring a 9H hardness Sapphire coating, this Screen Armour offers the ultimate anti-scratch, anti-shatter protection for your device screen EFM TT Sapphire screen armour also features a grease repelling layer to minimise fingerprints and smudges and, when paired with the EFM Case Armour range, provides superior 360 device protection.