Cats Best Original Clumping Wood Cat Litter is made from 100% natural organic fibres, and is a clumping litter that works as a natural odour and germ trap.Original Clumping Wood Cat Litter is an effective litter that, thanks to the unique JRS-Organic FIBRE700-Technology, functions like a natural odour and germ trap. Moisture and odours are absorbed quickly and long-term by the fibres' ultrafine capillary system. This stops odours developing over a long period of time – all without chemical additives.