They are designed to prevent drivers and passengers from being completely ejected from a vehicle by spreading out their bodies’ energy over their shoulders, chest, and pelvis rein a collision. Temperature: Withstands temperatures above 356 degrees Fahrenheit for some time; the melting point is around five hundred degrees Fahrenheit Done! https://articlescad.com/5-easy-facts-about-seatbelt-and-safety-belt-webbing-described-87560.html