A material which is composed of thin and continuous strands is known as fibre. Fibre can be of two types: natural fibre and synthetic fibre. The fibres which are obtained from plants and animals are known as natural fibres whereas synthetic fibres are man-made fibres. Examples of natural fibres are cotton and silk whereas examples of synthetic fibres are: nylon, polyester, etc. Silk is a type of natural fibre or animal fibre.