Fiber (American English) or fibre (British English) consists of elongated stringy natural , man-made or manufactured material. In the case of natural fibers, they often tie together the parts of natural creatures.
Man-made fibers include those made artificially, but from from natural raw materials (often cellulosic). Examples include fiberglass, rayon, acetate, cupro , and the more recently developed Lyocell.
Synthetic fibers are a subset of man-made fibers, which are based on synthetic chemicals rather than arising from natural chemicals by a purely physical process. Such fibers are quite often made from nylon, polyester, or acrylic polymers, although pure polyacrylonitrile fibers are mostly used to make carbon fiber. More exotic fibers have strong bonding between polymer chains (i.e. aramids), or extremely long chains (i.e., Dyneema). Elastomers can even be used, i.e. in spandex.
