The dual door litter box features a unique double-entry design. Choose between a one and two-way traffic configuration. Remove the stop-block to make the front entrance a two-way door - easy entry at the front entrance and exit via the top. This litter box also comes with an activated carbon filter at the back, which absorbs and traps unpleasant smells. The top easily folds open for easy clean-ups. Tired of litter tracking? Configure as a top entry litter box to nearly eliminate it. Helps prevent litter tracking. The litter is trapped by the non-slip, textured lid and falls back into the tray through holes that are large enough for most litter types. The covered design helps keep litter inside the box and is also ideal for cats prone to spraying or digging. In addition, it helps prevent non-feline intruders from getting to the litter. The spacious interior and the large swing door offer plenty of space making it perfect for cats of all sizes and multi-cat households.