Bissell 0552 Acarosan Dust-Mite Powder, 25-2/7 Ounces EPA-registered dust-mite powder with microsponge technology Kills and removes dust mites and their waste from carpets and rugs Time-released, unscented, water-based formula Single treatment kills dust mites for up to 4 weeks 25-2/7-ounce container measures approximately 4 by 6 by 11 inches