- Natural Fibers are actually the stalks of the plant. E.g. straws of wheat, rice, barley, and other crops including bamboo and grass. Tree wood is also such a fiber. The most used plant fibers are cotton, flax and hemp, although sisal, jute, kenaf, bamboo and coconut are also widely used
- Cotton-a soft white fibrous substance that surrounds the seeds of a tropical and subtropical plant and is used as textile fiber and thread for sewing
- Wool-the fine soft curly or wavy hair forming the coat of a sheep, goat, or similar animal, especially when shorn and prepared for use in making cloth or yarn
- Flax- a blue-flowered herbaceous plant that is cultivated for its seed (linseed) and for textile fiber made from its stalks.
- Silk-a fine, strong, soft, lustrous fiber produced by silkworms in making cocoons and collected to make thread and fabric.