Arm & Hammer Cat Litters. New Arm & Hammer Double Duty Clumping Litter Eliminates Both Types Of Odors For Advanced Odor Control. Its Breakthrough Formula Destroys Urine And Feces Odors Instantly And Helps Keep Your Home Smelling Fresh And Clean. 99% Dust Free And Low Tracking; Fresh Scent Refreshes Litter Every Time Your Cat Uses The Litter Box.