PERFECT FIT Premium Blue Pure 311 auto replacement fil-ters are compatible with Blueair Blue Pure 311 auto air puri-fiers. NOTE Not fit for 311 non-auto, please make sure the air puri-fier model is compatible Blueair Blue Pure 311 auto).

2 LAYER FIL-TRATION Compatible blueair 311 replacement fil-ters have high-efficiency 2-in-1 fil-tration systems. Particle Fil-ter attaching to up to 99.97% of airborne particles like smoke and pet dander. The activated Carbon fil-ter gets rid of household odors from pets, smoking, cooking, and VOCs.

UPGRADED 311 FIL-TER Our 311 fil-ter is exclusively designed for compatible with Blueair Blue Pure 311 auto air puri-fiers. Using a 360-degree air intake and up to 4x the fil-ter surface area as the Genuine Blue Pure 311 auto. It is rigorously tested for compatibility and service life and it is suggested to replace your 311 auto fil-ters regularly about every 6 months when used 24 hours a day to keep its peak performance.

SILENT TECHNOLOGY We deliver high-quality, durable and long-lasting replacements, allowing the fil-ter to last longer with a collapsible design. A High-quality 311 true HEPA replacement fil-ter combined with electrostatic filtration, and enable optimizing airflow and performance over time. Compare to traditional HEPA fil-tration, we have a faster and quieter cleaning effect.

COST-EFFECTIVE INVESTMENT Package included 2 packs of Compatible blueair replacement fil-ters for 311 auto air puri-fier in a neutral white box. They are an efficient investment. We value customer service and satisfaction. If you have any problems with the fil-ter fitting your air purifier, please contact us through our Amazon home page.