Fresh Step Odor Shield with Febreze Freshness Scented Clumping Cat Litter contains carbon to inhibit bacterial odor for up to 10 days and tight clumping clay for easy litter box maintenance. In this scented and low-dust formula, a paw-activated fragrance is released every time your cat uses the litter box. The clumping clay forms tight clumps, leaving virtually no stinky crumbles after scooping. To refresh and maintain your litter box, every time you scoop just add more Fresh Step scented cat litter. (from Fresh Step)