A beautiful wooden floor has to be protected and functional too. Usually the most battered area is the main entrance where grit and moisture id brought from outside. The coir mat is the perfect solution to combat this risk. But itself at one point can be damaging to the wooden floor if it is left loose over the floor as grit might slip under.
So for design as well as practical reasons we recommend to have the coir mat integrated / sunken into the wooden floor.
To transform this in a design feature you may opt for a seamless frame crafted into the wooden floor.