Natural coir mats use fibres taken from coconut shells. Coconut fibre provides strong brushing action. This makes coir mats suitable for entrance use. The mat surface scrapes dirt from footwear. Less dirt reaches internal floors. From Coconut Husk to Entrance Mat Coir fibre comes from the outer shell of coconuts. https://coirmatting62603.ampblogs.com/understanding-coir-entrance-mats-76184805