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. This reduces the amount of debris entering a building. How Coir Fibre Is Produced The husk surrounding the coconut is the source https://rylantcgjk.onesmablog.com/an-introduction-to-coir-mats-80159163