Natural coir mats are made using coarse coconut fibres. The husks are processed to form a dense mat surface. The fibres create a stiff brushing action. This structure helps remove dirt and moisture from footwear. They are often used in doorways and porches. They perform well in covered external spaces. https://coir-entrance-matting40368.full-design.com/an-overview-of-coir-entrance-mats-81910681