Fiber

Fiber (from the French Fibre) is a rope or string used as a component of composite materials, or matted into sheets to make products such aspaper or felt. Fibers are often used

in the manufacture of other materials. The strongest engineering materials are generally made as fibers, for example carbon fiberand Ultra-high-molecular-weight polyethylene.

Synthetic fibers can often be produced very cheaply and in large amounts compared to natural fibers, but for clothing natural fibers can give some benefits, such as comfort, over their synthetic counterparts.

From Wikipedia