Mbetter Blue Pure 311 2 Pack Replacement Filters

Mbetter Blue Pure 311 Replacement Filters Package Included：2 Pack Compatible with Blueair Blue Pure 311 Auto air purifier 2 Layer System： 1st layer. HEPASilent filter captures 99. 97% of particles as small as 0. 1 μm such as pollen，dust and pet dander. 2nd layer. Activated Carbon Filter absorbs household odors from pets，smoking，cooking and harmful VOC's.