The Pet Loo Plush Grass is a replacement grass pad to fit in the Pet Loo (sold separately). The grass is of optimum quality, designed and developed specifically to reduce your pet "business" hassles. Real world testing proves it has maximum drainage and long life. Just rinse it with warm water. Replace it only when you think you need to. No more early morning toilet trips, no more carpet stains, no more standing around in the rain while Fido shivers.