Coir door mats rely on processed coconut fibre. Coconut fibre provides strong brushing action. They are designed to sit at access points. The mat surface scrapes dirt from footwear. This reduces the amount of debris entering a building. From Coconut Husk to Entrance Mat Coconut shells provide the raw fibre. https://anti-fatigue-matting51505.pointblog.net/understanding-coir-entrance-mats-88123325