Additionally, Seat belt webbing may exhibit signs of fraying or excessive wear. Prolonged exposure to sunlight and regular usage can deteriorate the material, compromising its strength. For the reasons discussed above, NHTSA is denying Cybex's request to provide guidance on how FMVSS No. 213a's test procedures apply to deployable side http://www.drugoffice.gov.hk/gb/unigb/www.ledteks.com/seatbelt-and-safety-belt-webbing