Pettex

Pettex "Super Sieved" cat litter is manufactured from pure grey fullers earth, which occurs in natural sedimentary deposits laid down millions of years ago. Often called heavyweight or grey.
It is a natural clay product, said to be unrivalled in its ability to control odours, and does not need any chemical additives or scents to disguise unpleasant smella because it is a 100% natural deodoriser. Every granule can hold moisture up to 125% its own weight and will react with, and neutralise ammonia.
Unlike other cat litters, it is said to absorb instantly, locking in liquids and proventing them from spreading and soaking the whole tray. It also forms a solid lump when soiled and these clumps can be removed easily with a scoop, leaving clean fresh litter in the tray.