The Moss Bathroom Mat is a concept design by a Swiss designer, Nguyen La Chanh and is a creative way of bringing a little green in your home. The mat is made out of three types of green mosses, ball moss, island moss and forest moss. It naturally catches the water that drips off you when you step out of the shower or bath tub. Also the humidity of your bathroom helps these mosses to thrive naturally.
While the designer made mat is pretty expensive here is a guide on how to make your own living moss bathmat.