A timing belt is typically rubber with high-tensilefibres (e.g. fiberglass or Twaron/Kevlar) running the length of the belt astension members.

To build your own advanced combat helmet you would have to have a combination of both kevlar and twaron. After that it would basically be constructing the shape of the helmet and using both of the previous fibers.

Kevlar is not an element. It is a combination of elements, namely carbon, nitrogen, oxygen, and hydrogen. it is highly flammable. it makes up twaron, which is a substance used to make lacrosse sticks.

Some of the materials used in the making of fire-retardant clothing include coated nylon, Kevlar, Nomex, M5 fiber, Technora, wool, and Twaron. Some of these are synthetic fibers.

Modacrylic, Olefin, Acrylic, Polyester, Carbon Fiber, Vinyon, Saran, Spandex, Vinalon, Nomex, Kevlar, Twaron, Modal, Dyneema, Spectra, Polybenzimidazole fiber, Glass fiber, Metallic fiber, and many more.