Extra-hard clumping cat litter made from high-quality 100% natural clay, sodium bentonite, fragrance-free. A litter tray without ammonia. Thanks to its patented technology, OdourLock litter neutralises ammonia formation for unprecedented control of urine and faeces odours. Cat urine does not contain ammonia per se, but is formed in the litter tray when the urine comes into contact with oxygen and develops bacteria. Ammonia is responsible for the unpleasant odour coming from the litter tray. This technology is activated on contact with urine to neutralise odours for more than 40 days. Ultra-absorbent. OdourLock can absorb up to 6 times its weight in liquid. Because it produces less waste, it lasts longer than a competitor's litter and therefore costs you less. Annual litter consumption can be reduced by up to 45%. Safe for the respiratory tract of humans and cats. Tested by vets. Quick and easy cleaning for a multi-cat environment. 99.9% fragrance-free and soft, suitable for cats. Made from Wyoming mines in Canada.