Carbon eliminates odors. The same great odor control ingredients as Fresh Step clay. Same number of uses. 3.3 lb = 20 lb clay litter. The same great odor control ingredients as Fresh Step clay. Now in a natural litter, free of artificial fragrance. Powerful, natural odor control: Fresh Step Natural Scoop litter has activated carbon to constantly eliminate odors. Made with natural pine: safe for use by your cat. Clumps tight: easy to keep your litter box clean. Made in the USA.