32 oz. spray bottle that will treat approximately 600 square feet, re-treat surfaces every 90 days for optimum treatment benefit medically proven spray neutralizes allergens on contact for up to 3 months Active ingredient in this spray is tannic acid which has been medically proven to denature mite and cat allergen protein rendering it permanently non-allergenic. ADS will also neutralize allergens from plant and grass pollens, mold and mildew