ARM & HAMMER™ Cat Litter Deodorizer helps keep the litter box odour free and stay first-day fresh longer. ARM & HAMMER™ Baking Soda eliminates odours on contact. Moisture activated scent refreshes litter every time your cat uses the box. ARM & HAMMER™ Cat Litter Deodorizer helps prevent urine clumps from sticking to litter box. Use it with any litter (clay, scoopable, or natural; scented or unscented) to add odour protection to the litter box.