Fresh N Clean Odor Grabber Deluxe 1000 Air Purifier Replacement Filter Pack for Model AORF22FC-U, 2/pack Three odor fighting elements in one: Contains Arm & Hammer Baking Soda for organic dog & other small pet odors Contains activated carbon for gaseous odors such as methane Contains Zeolite for acidic odors such as ammonia 2 filters per package