PREMIUM SILICA CAT LITTER. EACH BAG LAST'S ONE MONTH Organic, hypoallergenic and biodegradable. Our unique silica litter will keep odours and bacteria locked away for a whole month guaranteed! Hygienic, chemical-free and 100% safe for your home and pets. * One bag will last one month for one cat. * Select Your Order Frequency. * Ingredients: Organic silica 100% * Kitty Litter Bags.