Nullodor crystal silica litter for cats is a new generation of litter granules. The micro-pored crystals absorb liquids very quickly & effectively so your cat will always have a pleasant, dry litter tray & you will only have to replace the litter every 4 weeks. Nullodor is a 100% natural product. It is compostable & neutralises bad smells in your cat's litter box. Nullodor is made from micro-porous granules with micro-capillaries. Each crystal has an absorption rate of 150%, absorbing liquids in a fraction of a second, then the moisture evaporates slowly to leave dry litter that can be re-used for a long time. Nullodor completely locks away odours for a month. They are absorbed at the same time as the liquids. Whilst the liquids evaporate, the odours are trapped in the centre of the silica granules, totally blocking ammonia emissions, so everything remains clean & fresh. After a while the cat litter will begin to turn yellow. This does not reduce its effectiveness, however it is important that excrement is removed on a daily basis & the litter should be moved around every day to avoid saturation of the same area. Nullodor is antistatic & dust-free. It does not stick to your cat's paws. A 1.5kg pack only takes up a little room & is very economical. Nullodor Silica Litter at a glance: No more unpleasant odours from the cat litter tray Economical: 1 cat = 1 bag = 1 month Does not take up much storage space: only 1.5kg of litter per pack Continuous absorption & odour retention Antistatic – does not stick to paws Eco-friendly: 100% natural product Non-toxic: safe, even if your cat accidently eats it Instructions for use: Pour a layer of Nullodor, at least 5 cm deep, into the clean litter tray. Remove all solid matter daily, & give the litter tray a good shake so that the litter is thoroughly mixed. Change the litter completely every 4 weeks.. All components in Nullodor have been approved & recognised as non-toxic by the FDA (Food & Drugs Administration).