Smart Seat Belts: The advent of smart technology extends to seat belts, incorporating sensors and electronic components to enhance safety. Smart seat belts can monitor occupants, detecting whether they are adequately buckled. Use a heavy-duty machine for thick fabrics. Load your machine with thread that is suitable for seat belts. http://www.drugoffice.gov.hk/gb/unigb/www.ledteks.com/seatbelt-and-safety-belt-webbing