Catsan Hygiene Cat Litter 10 Litres has unique, fine pored mineral granules made from natural lime and quartz sand which quickly absorbs liquid. Each granule contains thousands of micro-pores which give Catsan its strong absorbency power, acting like a sponge. The granules are sprayed with a mineral salt solution for great odour control. Plus, the white colour of Catsan helps to detect changes in the cat's urine colour, which can be an indication that your cat is unwell.