The ferplast outdoor cat litter tray combines innovation and design with easy use and spaciousness it has all the benefits of a traditional indoor litter tray but can be used outside either on patios or other uncovered areas as it is completely waterproof and the hood protects it from showers the large opening allows even large cats enough space to climb inside the tray is deeper than in an average litter tray which makes it possible for cats to bury their faeces if so inclined ferplast o