Home-X Pet Potty, 3 Piece Dog Relief System, Dog Training Pad, Pet Park Non-toxic mat consists of 3 layers to keep your home clean and odor-free. Great for indoors, porches, patios, and balconies. Portable, easy to clean, just rinse with soapy water. Indoor pet potty is made of synthetic surface which is similar to grass. Select from 2 sizes: 20 x 25 x 2 Inch or 20 x 30 x 2 inch for larger dogs