Final answer:
Kevlar and Nomex are fire-resistant synthetic materials used in the construction of personal protective equipment for firefighting.
Step-by-step explanation:
Kevlar is a fire-resistant synthetic material used in the construction of personal protective equipment for firefighting. It is best known as a component of body armor, combat helmets, and face masks. Kevlar-based clothing is considerably lighter and thinner than equivalent gear made from other materials. Another fireproof material used in protective gear is Nomex, which has excellent thermal, chemical, and radiation resistance. Nomex is used in racing suits, firefighter gear, and military flight suits. It is important to note that PTFE and polypropylene are not typically used in the construction of fire-resistant personal protective equipment for firefighting.