A mobile phone screen protector is a thin sheet of plastic, glass, or other material that is applied to the screen of a mobile phone to protect it from scratches, dust, and other damage. Screen protectors are designed to be highly transparent and provide a layer of protection that minimizes the visibility of scratches and smudges. They are usually made from either a thermoplastic polymer or tempered glass, and some models may also include an anti-glare coating or an oleophobic coating that helps keep fingerprints and oils off the screen.