Sonnyridge Easy Dog Potty Training - Made with Synthetic Grass - 3 Layered System - Pan Tray - Great for Dogs Stuck in the House All Day - Indoor Use. It's Like a Dog Litter Box or a Dog Indoor Potty Helps potty train your dog faster - this synthetic surface is very similar to grass Helps all dogs if they can't get outside such as in a condo, apartment, balcony, patio, indoor, etc. So easy to clean - just rinse with soapy water and you're ready to use again. Made tough and durable Anti-microbial grass - synthetic grass that has been treated with a substance that makes it hard for bacteria to grow and it absorbs odors 3 Layer system - outer layer - synthetic grass, middle layer - porous tray that separates the upper and bottom layers, bottom layer - durable self contained tray that holds the urine