A seat belt is a safety device found in vehicles designed to secure passengers and reduce the risk of injury during a crash. It typically consists of a strap that goes across the body and a buckle that keeps it in place. When worn properly, seat belts help to keep occupants in their seats and prevent them from being thrown forward or ejected from the vehicle. Seat belts are an essential part of vehicle safety systems and are required by law in many places. They work by distributing the force of a collision across stronger parts of the body, such as the pelvis and ribcage, thereby minimizing the impact on vital organs. Regular use of seat belts can significantly lower the chances of serious injury or death in accidents involving cars, trucks, and other vehicles.