While both regular and seat belt webbing stand up well to acids and UV rays and don’t rot or shrink, the one seat belt used is slightly thinner and has a lower tensile strength than regular polyester webbing. Use a heavy-duty machine for thick fabrics. Load your machine with thread https://case.edu/cgi-bin/newsline.pl?URL=https://www.ledteks.com/seatbelt-and-safety-belt-webbing