Our OdourLock mineral litter is produced from high-quality clay, 100% pure and natural, for maximum efficiency without compromise:Optimal odour control for more than 40 days.Gentle and comfortable for your cat, creates hard and uniform clumps that are easy to scoop and clean. Safe for the respiratory tracts of humans and cats. Quick and easy cleaning for a multi-cat environment.Tested by veterinarians. Made in Canada.