UNIQUE FORMULA THAT ELIMINATES AMMONIA ODOR COMPLETELY. When it comes to cat litter tray cleanliness, cats&their owners always have high demands&standards. This is the time when America Litter® comes to action. Thanks to the special composition formula America Litter® seals ammonia odor in just about 24 h &keeps cat toilet from all kinds of bad smells. Moreover it clumps fast&strong & preventing cat toilet from mess.