A shoulder belt is a safety device found in vehicles, designed to keep passengers secure during a ride. It is typically made of strong fabric and is attached to the car's frame. When you buckle up, the shoulder belt crosses over your chest and shoulder, helping to prevent injury in case of sudden stops or accidents. Wearing a shoulder belt is important for everyone in the vehicle, including children and adults. It works best when used in combination with a lap belt, which goes across the hips. Together, these belts help protect passengers, making travel safer for everyone, including those in the back seat.