I. Natural Fibers

Organic fibers: cotton, hemp, wool, silk, etc.

Inorganic fibers: asbestos

II. Chemical fibers

Organic chemical fibers: regenerated fibers (viscose, etc.), acetate fibers, synthetic fibers (polyester, nylon, acrylic, etc.)

Inorganic chemical fibers: glass fibers, ceramic fibers, metal fibers, carbon fibers, etc.