Natural fibres are divided into two main classifications:
animal (protein) fibres and plant (cellulose) fibres.
Protein fibres are derived from animals and include wool, cashmere, alpaca, silk and leather.
Cellulose fibres are derived from plants, and are products of agriculture. Fibres are either bast fibres (the fibre found in the stem of the plant) such as flax linen or hemp, or seed fibres such as cotton.
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