This litter consists of larger, non-clumping silica sand crystals. It is dust free, hassle free and provides maximum absorption through microscopic pores. It contains microbeads that assist with odour control. Marltons Litter Crystal Cat Litter includes unique anti-bacterial blue beads that inhibit the growth of bacteria for a cleaner, more hygienic tray. It is highly absorbent and long-lasting. This cat litter will last for about a month.