Cats Best Original Clumping Cat Litter is a lightweight cat litter made completely from organic fibres.As a clumping cat litter, Cats Best Original uses the natural power of active wood fibres, which effectively absorb liquids and odours - up to seven times their own volume, and trap them deep inside. This neutralises odours so effectively, that the cat litter can remain in the litter tray for up to seven weeks.Cats Best Original functions best when you regularly dispose of the solid excretions and clumps that form after the cat has used the litter tray, and because it\'s clumping, you only need to remove the soiled parts, making your litter last longer. What\'s more, Cats Best Original is made exclusively of renewable raw materials, which means it is both sustainable and biodegradable!Key FeaturesMade from renewable plant fibre-based raw materials 100 % natural and with no chemical additives Made from PEFC-certified secondary raw wood materials - no trees are felled to make Cats Best!Very economical: an average of 21 kg of conventional cat litter is consumed per cat per month, but with Cats Best the figure is only about 2.1 kg. This is the quantity that needs to be bought, put into the tray, and ultimately disposed of