Note: The screen protector is intentionally cut smaller than the display, as the edges are curved. Better than glass: it won't break or shatter (not real glass, not tempered glass). Plastic armor film with 9H hardness (300g) and anti-shock layer (shock-absorbing armor film). Deliberately smaller than the Huawei Watch D glass due to its curvature (see photos), bubble-free and can be removed at any time without leaving residue (no adhesive). Anti-reflective (matte anti-glare), approximately 0.2 mm thin, oleophobic anti-fingerprint coating. 10-year manufacturer warranty - branded product made in Germany.