2-Pack 45i and Flex True Replacement Filter Compatible with old BreatheSmart Flex and 45i Air Purifiers, 22-in-1 Filters + 2Carbon Pre-Filters

Perfectly CompatibleThe filter is compatible with old BreatheSmart Flex and 45i Purifiers. Pls make sure the filer meet your model. | 2-in-1 DesignThe filter adopts a three-in-one filter design, including a pre-filter, HP filter. | Activated Carbon Filter--High efficiency activated carbon can reduce odors, like smoke, pet odors. | Life Time--To keep your purifier performing at it's best, we recommend replacing your unit's air filter every 3-4 months. | Buy With ConfidenceIf you have any questions about the filter, please contact us and we will help you solve the problem as soon as possible.