Regular replacement of the AeroVac filter will maintain Roomba's cleaning performance while reducing infiltration of dust, pollen and other allergens. The filters are easy to see and access, so you can snap them on and off with minimal effort. The Roomba side brush reaches along edges to remove more dirt, dust and debris. Side brushes are easy to remove and replace as part of routine maintenance. What’s In The Box 3 AeroVac Filters 3 Side Brushes