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. Coir mats are commonly placed at entrances. They suit both indoor and sheltered outdoor areas. https://archerpmfxp.blogocial.com/an-overview-of-coir-entrance-mats-75625311