Better than glass: doesn't break, doesn't splinter (no real glass, no tempered glass). Plastic bullet-proof glass with 9H hardness (300g) and anti-shock coating (shock-absorbing bullet-proof foil). 10 years manufacturer's guarantee - branded product made in Germany. Crystal clear (almost unseeable), approximately 0.2mm thin, oil and grease-proof anti-fingerprint coating. Fits perfectly to a Panasonic Lumix DC-G91, bubble-free and can be removed at any time without leaving residue (without adhesive).