12.7kg The more cats you have, the more you need the extra-strength odor-blocking protection of ARM & HAMMER® Multi-Cat Strength Clumping Litter. Multi-Cat's Activated Baking Soda Crystals absorb even the toughest odors and our most advanced Clumping Technology makes scooping a snap. Multi-Cat keeps cats coming back to the box no matter how many paws are in the litter.