Seat belt webbing is made from 100% polyester and has the strength to support more than 28 kNw or 6,000 lbs. It is manufactured to meet or exceed the safety standards of the automotive industry. Seat belt webbing does not shrink, rot, mildew or mold. However, it can get frayed, https://vuf.minagricultura.gov.co/Lists/Informacin%20Servicios%20Web/DispForm.aspx?ID=10574680