Why do some soldiers or special police officers wear bulletproof hats instead of helmets to block their sight?

1: Generally, special police officers or soldiers will wear combat hats to help hide when performing reconnaissance, hostage rescue and other combat tasks.

Note: to correct it, generally speaking, you won't wear the kind of hat that you say is unsafe and blocks your view (the kind of hat you say is usually the kind you wear in an ordinary suit, right, like this:

), unless it is an emergency, wearing this hat is death. Television and movies are all filmed, so they are often informal.

2. If it is a prepared frontal combat conflict, such as small-scale tense tasks such as forcibly rescuing bank hostages, bulletproof helmets are generally worn instead of others.