Coarser granules are mostly made from large bentonite granules. To these we also add, according to our special 3in1 Hygiene Formula™, medium-sized and small granules. Large granules bind odours extra fast, the medium-sized granules form extra-firm clumps, and the small granules increase the yield of the litter. After the cat toilet has been used, firm, medium-sized clumps form, which can be easily removed with a shovel. The coarser granules ensure good odour binding and that the granules are not taken out of the cat toilet.