Biokats classic fresh 3in1 cat litter performed significantly better than its predecessor when tested for the three most important product characteristics odour binding clump firmness and economy in use this high quality clumping litter is made up of three different sizes of granules the large granules in biokats classic fresh 3in1 cat litter have especially large pores which absorb liquid and unpleasant odours like a sponge the medium granules are the perfect size to fill the gaps betwe