Mimi Pet Cat Litter Silica Gel Crystals, Ultra Absorbent & Lightweight 4-Pound Bags by Mimi Litter Pack of two (2), 4-pound bags of amazing, environmentally-friendly Mimi silica sand kitty litter. Each ultra-lightweight 4-pound bag lasts an entire month for 1 cat without changing! Absorbs and Controls The Odor of Urine and Feces In Seconds No dust & litter box stays dry--no goopy, clumpy mess or pawprints on the floor. Mimi Litter is ultra-lightweight--no more lugging back-breaking kitty litter bags from the car to your house.