iRobot Roomba 700 Series Dual HEPA Filter 6-Pack Replenishment Kit Maintain cleaning performance while reducing infiltration of dust, pollen and other allergens The roomba 700 series dual hepa filters capture dust particles as fine as 0.3 microns, limiting their recirculation into the air Replace your filters every 2-3 months for peak cleaning performance Compatible with all roomba 700 series robots The filters are easy to see and access, so you can snap them on and off with minimal effort