Made from whole kernel corn this clumping cat litter from the usa is 100 ecological worlds best cat litter extra strength is the result of a survey of customers who had asked for an even better clumping litter with even more effective odour absorption a natural additive absorbs odour effectively even in households with several cats the litter lumps into small clumps which are completely water soluble so they may simply be flushed down the toilet the clumps are easy to scoop up odour is