1, some masks can really prevent fire, corrosive liquid and glass fragments from splashing on the face.

2. Absorb sweat and keep your face dry, which is convenient for long-term latent standby.

3, can cover up the expression of police officers (everyone will be nervous)

Masking looks fierce, which puts great psychological pressure on criminals.

5, to prevent personal identity exposure, but not to prevent retaliation, but to reduce the psychological pressure of police officers themselves. After all, the actions of the special police are mainly violent actions.

6. For some head devices, such as headphones, the microphone can also play a fixed role.