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