Passive restraint systems are safety features in vehicles designed to protect occupants during a crash without requiring any action from them. Common examples include seat belts and airbags. These systems automatically engage to minimize injury by absorbing impact forces and keeping passengers securely in their seats. Unlike active restraint systems, which require users to buckle up or adjust settings, passive restraints work automatically. For instance, airbags deploy upon collision, providing a cushion that reduces the risk of head and chest injuries. Overall, passive restraint systems play a crucial role in enhancing vehicle safety and reducing fatalities in accidents.