【PERFECT FIT】The filters is ONLY compatible with Blueair Blue Pure 311 Auto air puri-fier. Not include with 311 【NOTE】Not compatible with Blue Pure 311, 311i Max, 311i+ Max, 211, 211+ Auto, 211i Max, 411, 411 Auto, 411i Max, 511, 511i Max, Mini Max air puri-fier 【True Air Filter】Our 311 Auto replacement filter made of air filter and a high-efficiency activated carbon filter for good clean filtration and performance 【OPTIMAL PERFORMANCE MAINTENANCE】For the ongoing top performance of your Blue Pure 311 auto Air Puri-fier, based on actual usage the filter should be replaced within 9 months 【SUPERIOR QUALITY】311 auto replacement filter is made of high-quality non-woven activated carbon and can adsorb 99.99% of air particles (with a diameter as small as 0.03 micrometers) Mbetter Blue Pure 311 Replacement Filters
Package Included：3 Pack
Compatible with Blue Pure 311 Auto air purifier

2 Layer System：
1st layer. Silent 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.


It is suggested to replace the filter every 6 months for optimal performance.

This is not a OEM product. The brand names and logos are the registered trademarks of their respective owners.
Any use of the brand name or model designation Blue Pure 311 auto for this product is made solely for purposes of demonstrating compatibility.