Coir door mats rely on processed coconut fibre. The material has a naturally rough texture. This makes coir mats suitable for entrance use. Shoes passing over the fibres release soil. This reduces the amount of debris entering a building. How Coir Fibre Is Produced Coconut shells provide the raw fibre. https://antislipmats08272.blogozz.com/38384108/understanding-coir-entrance-mats