Advanced Odor Control for Multiple Cats. Boxiecat Extra Strength Premium Clumping Clay Cat Litter tackles odors in two ways. Extra Strength probiotics instantly go into action whenever waste is present and stop odors from forming. Extra Strength‚Äôs Flat Top¬Æ clump seal in ammonia and bacterial odors so they can‚Äôt escape. Extra Strength‚Äôs Flat Top¬Æ clumps form on the top of the litter and scoop cleanly -- they don't sink to the bottom, stick or break apart. Boxiecat is the Cleanest Litter Box Experience‚Ñ¢. It‚Äôs like a fresh, new litter box after every scoop, with no odors left behind. Boxiecat is longer lasting, ultra-clean, and cost-effective. You won't have to replace your litter box as often or scrape stuck-on clumps from the bottom of the litter box. One 28 pound bag will last two cats about one month. No dust clouds; 99.9% dust free. Made in the USA. ClumpingForms tight clumps for easier scooping and cleaning. Low DustLow amount of dust for clean pouring and removal. Multiple PetsFor multiple pet use.