The ScoopFree Litter Tray is perfect for reducing odor in your home. Made of blue plastic, it absorbs waste and all foul smells and locks in odor which leaves the litter box smelling clean and fresh. The tray is easy to use and is compatible with both the Original and Ultra Scoop Free Automatic Cat Litter Boxes. It is also dust free and has a leak protection plastic tray lining that helps prevent leaks.