The granules are made from organic fibres, which come from fir and spruce wood. The granules can absorb liquids up to seven times their own volume. Unpleasant smells are immediately contained in the interior of the litter. This litter lasts longer than other litters, which means that you have to clean the litter tray less often. Cat's Best Öko Plus / Original is biodegradable and compostable. Key Benefits Absorbs up to seven times its own volume Locks in unpleasant smells Biodegradable Without artificial or chemical additives Contents Cat's Best Öko Plus / Original is available in bags of 10 litre (4.3 kg), 20 litre (8.6 kg) and 40 litre (17.2 kg).