Doortex Ribmat, Heavy Duty Indoor and Outdoor Entrance Mat, Charcoal Gray, 48" x 72" (FR412180FPRGR) Contoured top surface is made from both natural and synthetic materials Heavy duty construction for use indoors or outdoors; ideal for home or business Excellent moisture absorption and dirt removal Heavy rubber backing adds stability and reduces risk of slipping 48" x 72", charcoal; mat size may vary slightly due to manufacturing process