Coir mats are made from coconut husk fibres. The material has a naturally rough texture. The structure suits doorway placement. The mat surface scrapes dirt from footwear. This reduces the amount of debris entering a building. How Coir Fibre Is Produced The husk surrounding the coconut is the source material. https://augustywpbt.blogtov.com/20028706/understanding-coir-entrance-mats