The litter clumps well around urine. But if the cat has loose stools the litter is not able to absorb the moisture fast enough or hold the stool in one place. While trying to cover it the stool just slips on the sand and breaks into little pieces and spreads throughout the box instead of being held together. I’m guessing the sand works well for proper formed stools. But if the cat has loose motions this is the worst litter. I’ve never seen other litters perform this bad. It’s quite frustrating for the cat as well trying to cover all the little bits.