A full coverage PMMA (Poly(methyl methacrylate)) screen protector is a type of protective film designed to cover the entire surface of a smartwatch's screen. PMMA is a type of plastic that is often used as a substitute for glass due to its shatter-resistant and scratch-resistant properties.

A full coverage PMMA screen protector can help to protect your smartwatch's screen from scratches, cracks, and other damage. It can also help to keep the screen clean and free of fingerprints and smudges.

When choosing a full coverage PMMA screen protector for your smartwatch, make sure to select one that is specifically designed for your model of smartwatch. This will ensure a proper fit and maximum protection for your device.