BLUEAIR Blue Pure 211i Max Series SmokeBlock Genuine Replacement Filter, Extra Carbon Captures 99.99% of Wildfire Smoke, fits Blue Pure 211I Max Air Purifier

Customers find the air filter effective, with one mentioning it helped with seasonal allergies, and they appreciate its quality and easy installation. The filter performs well at reducing smoke and odor, particularly from litter boxes. While some customers consider it worth the price, others find it too expensive.