Introducing The Kit Cat Crystal Clumping Sparkling Charcoal Litter in a 1.8kg size. The Kit Cat Crystal Clumping Mystic Rainforest Litter brings colours and scents to your kitty's litter box! This silica gel super lightweight cat litter is soft and gentle on the paws. Kit Cat Crystal Clump comes in the form of silica gel and is dust-free and gentle on your cats paws, making it perfect for kittens. Crystal Clump also has a high absorption rate and effective odour control. Its extremely low maintenance - simply remove the clumps and the rest of the litter stays clean.