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. Less dirt reaches internal floors. From Coconut Husk to Entrance Mat The husk surrounding the coconut is the source material. https://natural-coir-entrance-mat73702.blogspothub.com/38021836/what-defines-a-coir-door-mat