Coir door mats rely on processed coconut fibre. The material has a naturally rough texture. They are designed to sit at access points. 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://felixccaxr.blazingblog.com/39187611/understanding-coir-entrance-mats