BLUEAIR GENUINE PRE-FILTER: Fits Blue Pure 511 air purifier; Blueair genuine pre-filter replacement in Arctic Trail color is designed for optimal performance; Compatible with Blueair Blue Pure 511 air purifier | | DESIGNED FOR RE-USE: Vacuum fabric pre-filter as often as you'd like; Removable and washable; When the pre-filter requires a deeper clean, wash on a gentle, low-temperature cycle in the washing machine and hang to dry | | WASHABLE PRE-FILTER: Blueair Blue Pure 511 genuine pre-filter traps pet hair, pollen and dust; Vacuum exterior fabric; Removable and washable for re-use | | CHOOSE YOUR COLOR: Customize your Blueair Blue Pure 511 genuine pre-filter; Available in Scandinavian inspired colors including Arctic Trail, Winter Reed and Night Waves | |