Coir mats are made from coconut husk fibres. Coconut fibre provides strong brushing action. The structure suits doorway placement. Shoes passing over the fibres release soil. This reduces the amount of debris entering a building. From Coconut Husk to Entrance Mat Coir fibre comes from the outer shell of coconuts. https://martinxxxto.amoblog.com/an-introduction-to-coir-mats-61207877