A lightweight kitty litter with virtually indestructible clumps? Introducing NEW ARM & HAMMER™ HardBall™ Clumping Litter. The innovative formula works in a new way to quickly shrink cat waste and odors into ultra-compact clumps for easy, no-mess scooping. Our Lightweight Perfected Formula is made with highly absorbent sorghum grain and is nearly 60% lighter than our regular clay litter. A clean Garden Bloom scent offers 14 days of odor control — guaranteed! Purrfect for multiple cat homes. Hardball™ Clumping Cat Litter is made from U.S.-grown sorghum. There may be natural variation in the litter’s color from batch to batch, but its performance and clumping power stay the same.