Intersand Odour Lock Ultra Premium 12kg Cat Litter (Quick Clumping) - 99.9% Dust Free, Lasts 33% longer. MADE IN CANADA. ODOUR LOCK, the best clay litter on the market! An ultra-premium product that will exceed your expectations! ODOUR LOCK has been scientifically proven to offer outstanding odor control, thanks to its SMART ODOUR SHIELD technology, ODOUR LOCK neutralizes both urine and feces odors for overs 40 days. 99.9% dust free, ODOUR LOCK is highly effective and safe for you and your cat. Composition: Made with natural clay. Caution: Pregnant or breast-feeing women and people with suppressed immune systems should consult a physician before handling litter.