Synthetic fibres are generally much more stain resistant than natural fibres. For example, wool has a protective barrier that covers the fibre, but once a substance penetrates that barrier and gets to the fibre’s core, it is virtually impossible to remove the stain.
Synthetic fibres are more stain resistant and easier to maintain. They are more easily cleaned and can be deep cleaned through hot water extraction. Natural fibres come at a higher cost to maintain than synthetic fibres.
Natural fibres are made from more sustainable resources and are more environmentally friendly than synthetics. Gasses emitted from synthetic fibres are known as volatile organic compounds (VOCs). Natural fibres do not release VOCs but if attached to a synthetic backing, then it can still occur.