A shoulder belt, commonly known as a seatbelt, is a safety device found in vehicles designed to secure passengers in their seats. It consists of a strap that goes across the shoulder and chest, helping to prevent injury during sudden stops or accidents. Proper use of a shoulder belt can significantly reduce the risk of serious injury. Shoulder belts are typically part of a three-point seatbelt system, which includes a lap belt that secures around the waist. This design helps distribute the force of a collision across stronger parts of the body, enhancing passenger safety. Regular checks for wear and tear are essential for effective performance.