World's Best Cat Litter's powerful, concentrated formula traps odors and forms tight clumps on contact. No more nasty ammonia smell stinking up your house. Natural compressed corn formula is free of silica dust, so you and your pet can breathe easy with a 99% dust-free litter. Environmentally friendly: flushable formula is safe for septic and sewer systems, making clean up a breeze! Quickly forms small, tight, easy to scoop clumps that result in less litter waste.