Coir entrance mats use fibres taken from coconut husks. These fibres are cleaned, dried, and pressed into matting. The finished mat has a rough texture. The fibre texture scrapes mud and debris from shoes. They are often used in doorways and porches. They are used inside buildings and under canopies. https://entrance-mat03220.blogsvila.com/39511173/what-are-coir-mats