As delicate as it may look, this door mat is robust and can also withstand rough contact with the soles of rubber boots or work shoes. The mesh is made of sturdy galvanized wire. The door mat can be used both indoors and outdoors, but preferably in a covered area in front of the entrance. Exposed to wind and weather on a permanent basis, the galvanization can be damaged after just two to three years. Minor rust spots may then appear. In any case, the wire mesh will discolor over time and take on a dark patina.