Coir door mats rely on processed coconut fibre. The material has a naturally rough texture. This makes coir mats suitable for entrance use. Foot traffic activates the cleaning action. This reduces the amount of debris entering a building. From Coconut Husk to Entrance Mat Coconut shells provide the raw fibre. https://spencernygmr.madmouseblog.com/19848829/what-defines-a-coir-door-mat