Worlds Best Cat Litter Extra Strength Clumping Formula harnesses the power of naturally absorbent corn with an added natural plant material for enhanced odour control to deliver 2X longer lasting performance than the leading US litter brand. This naturally safe option allows cat lovers like you to smell less, clean less and buy less. This formula is ideal for homes with 2 or more cats.World's Best is a revolutionary alternative, all natural, organic break-through in scoopable cat litter. Made from whole kernel corn, it's 99% dust-free and contains no clays, silica dust, synthetic binding or dust reducing agents. Its odour control is second to none and it's also totally flushable!Weight Conversion Guide 28lb - 12.7kg 14lb - 6.35kg 8lb - 3.63kg