Breathe Fresh, Live Well! 🌱 Experience cleaner air with 99.97% particle removal. Designed for durability and efficiency. Say goodbye to pet dander and allergens. Combat seasonal allergies with advanced filtration. Eliminate unwanted odors with activated carbon. Large Particle Pre-filter True Medical Grade HEPA Activated Carbon & Zeolite The Austin AirFR400A Healthmate Standard Replacement Filter features a four-stage filtration system, including a large particle pre-filter, medium particle pre-filter, activated carbon and zeolite for chemical removal, and a true medical-grade HEPA filter that captures 99.97% of particles larger than 0.3 microns, ensuring a healthier indoor environment.