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. The design supports effective dirt control at the door. They are often used in doorways and porches. They perform well in covered external spaces. https://entrance-mats17035.suomiblog.com/an-overview-of-coir-entrance-mats-55117227