Coir entrance mats use fibres taken from coconut husks. The husks are processed to form a dense mat surface. The finished mat has a rough texture. The fibre texture scrapes mud and debris from shoes. Coir mats are commonly placed at entrances. They suit both indoor and sheltered outdoor areas. https://antislipmats72604.ampedpages.com/an-overview-of-coir-entrance-mats-66074672