Arm & Hammer HardBall Lightweight Clumping Cat Litter (10.5 lb) – This advanced clumping litter uses HardBall™ technology to create ultra-compact clumps that won’t crumble, making scooping quick and tidy. It delivers long-lasting odor control (up to 20 days) with continuously active odor blockers and the power of baking soda. The lightweight, low-dust formula is easy to carry and pour, yet super absorbent, so it keeps the litter box fresh and clean with less weight.