SPANSET's Quality management continually tests materials and end products. They are checked continuously in SPANSET's own laboratory and in external testing programmes. Made from application-specific high tenacity polyester, restraint – or seat belt webbing, has a tensile strength sufficient to support approximately three metric tons. NHTSA rules can also preempt http://pandora.nla.gov.au/external.html?link=https://www.ledteks.com/seatbelt-and-safety-belt-webbing