Seat belts are safety belts used on equipment, airplanes, etc., or belts used for safety during high-altitude operations and performances. The main raw materials are polyester, polypropylene and nylon. Seat belts are not just webbing, except for webbing, seat belts and other parts. The ideal seat belt action process is: First, tighten in time, and do not hesitate to "press" the person in the seat at the first moment of the accident. Then, relax moderately, and when the impact peak has passed, or when the person has been protected by the airbag, the seat belt is properly relaxed.