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 are used inside buildings and under canopies. https://antifatiguemats31481.thenerdsblog.com/45766360/understanding-coir-door-mats