House dust contains a combination of allergens from several sources, most often dust mites, pets, insects, pollens and molds. Allersearch ADS™ actually denatures allergens rendering them permanently nonallergenic. Allersearch ADS™ can be used on upholstered furniture, draperies and blankets throughout the house. For continued protection, repeat application every two months. This all-natural plant-based formula comes in a 32 fl. oz. spray bottle, enough to cover 600 square feet. Please test before using on light-colored fabrics.