CATSAN Hygiene Litter has distinct characteristics specifically developed to meet the natural needs of your cat: White Hygiene Granules: Thousands of micropores on the surface rapidly absorb moisture like a sponge, safely locking it in. Thus, the litter tray remains visibly clean and hygienic. Natural Quartz Sand and Chalk CATSAN Hygiene Litter consists of non clumping natural quartz sand and chalk giving CATSAN Hygiene Litter the clean white colour. Extra Odour Protection CATSAN Hygiene Litter offers patented long-lasting odour prevention. Active ingredients prevent the growth of bacteria, efficiently neutralising odours before they can develop.