Seat restraint is a term used to describe the use of a BELT or other device to secure a person in a seat. A BELT is the most common form of seat restraint, and it is typically made of fabric or other strong material that is fastened around the waist of the person sitting in the seat. The BELT is designed to keep the person in the seat during sudden stops or turns, and it can also help to reduce the risk of injury in the event of an accident.