Natural coir mats use fibres taken from coconut shells. These fibres are stiff, coarse, and durable. The structure suits doorway placement. Foot traffic activates the cleaning action. Less dirt reaches internal floors. The Origin of Coir Mat Materials Coconut shells provide the raw fibre. The material is treated before shaping. https://coirmats84901.bloguetechno.com/what-defines-a-coir-door-mat-75578166