Coir door mats rely on processed coconut fibre. These fibres are stiff, coarse, and durable. This makes coir mats suitable for entrance use. The mat surface scrapes dirt from footwear. Less dirt reaches internal floors. The Origin of Coir Mat Materials Coir fibre comes from the outer shell of coconuts. https://fernandomoomh.blogsvila.com/39754411/understanding-coir-entrance-mats