Soft Realistic Grass The artificial grass rug is thick and soft, grass silk isn't easy to fall off. It's suitable for indoor-outdoor pets playing area use. Drainage Hole There are many drainage holes of the bottom. So it's easy to clean and can be dry quickly. Fireproof Material Our Dog Potty Grass Pad used flame retardant materials, so that is difficult to be ignited. UV Protected Our Grass Pee Pads is UV Protected, so it can uesd outdoors perfectly.