Coir entrance mats use fibres taken from coconut husks. These fibres are cleaned, dried, and pressed into matting. 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 are used inside buildings and under canopies. https://lorenzobzysi.timeblog.net/75536253/what-are-coir-mats