Moisture activated fragrance. Stop litter odor. Keeps any litter first-day fresh longer. Safe to use around pets. It works differently to really eliminate odor. If you're like most cat owners, you've tried just about everything to stop litter odor. Now the search is over. Arm & Hammer Cat Litter Deodorizer effectively eliminates odor, while keeping litter first-day fresh longer. The difference is amazing - see for yourself! Just sprinkle it into the pan and the odor-absorbing power of genuine Arm & Hammer Baking Soda goes right to work. Plus, moisture-activated fragrance is released every time your cat uses the box. Use it with any litter (clay or scoopable; scented or unscented) to eliminate odor. It even makes cleanup easier because it keeps litter from sticking to the pan.