Nowadays, seat belts are usually made of 100 percent polyester. Less-energized yarns, according to research, produce more durable seat belts because the threads can pack together more tightly. Seat belt webbing typically has about 300 warp threads per 46mm belt or nearly 150 ends mit hilfe inch. Document page views https://www.metooo.co.uk/u/67bc58f0a7b234122735b32f