Natural coir mats use fibres taken from coconut shells. These fibres are stiff, coarse, and durable. The structure suits doorway placement. Shoes passing over the fibres release soil. Less dirt reaches internal floors. How Coir Fibre Is Produced Coconut shells provide the raw fibre. The material is treated before shaping. https://coir-mats49023.bloguetechno.com/what-defines-a-coir-door-mat-75317426