Odour Buster Original is a premium clumping cat litter made from responsibly mined, bentonite clay and their exclusive odour-eliminating ingredients. It was developed from a formula originally created to control odours in the toughest agricultural settings: pig and chicken farms! If the Odour Buster recipe can eliminate odours in chicken coops and pig pens, imagine what it can do for your cat's litter box! It's never been so easy to keep a fresh, clean litter box!