StovePipeCat's Awesome Almost Invisible Cat Litter (9 Pounds) Each 9 pound bag provides 10 - 12 weeks of litter for 1 cat or 3 - 4 weeks for 3 cats. Our product is 44% lighter than clay and our bags have strong built-in handles that make carrying and pouring easy. Virtually dust free and minimally tracking. You will NEVER see footprints or need to scrape the bottom of the tray. Simple maintenance saves you time! Your cat box will not smell for weeks even with as little as 1" of litter. REALLY! Urine odor is neutralized in under 30 seconds. Solids are dried out like beef jerky and do not smell even if not buried.