Hassle Free Fit - Compatible with Coway Airmega 400 Filter Replacement and Airmega 400s Filter Replacement (400/400S filters) - Manufactured under strict quality standards to maintain peak performance and keep the air in your home, apartment, or office clean - Performs as well as the original filters that came with the unit Powerful Filtration - All-in-one HEPA filter system compatible with Coway 400 filters - H13 true HEPA filter captures fine particles down to 0.3 microns - Activated carbon filter removes common odors to improve indoor air quality Great Value - Includes 2 replacement filters (2 pcs / 1 set) with H13 True HEPA and High-Efficiency Activated Carbon Layer, compatible with Coway 400S filter - Replacement recommended every 12 months for best performance; replace sooner depending on air quality and environmental factors - An efficient investment for ongoing filtration Easy Setup - Tool-free replacement process - Simply remove the old filter and insert the new one to restore filtration Use Scenarios - Living rooms or bedrooms in homes with pets to reduce dander and odors - Small to medium offices to maintain clean air in shared workspaces - Apartments during allergy season to minimize airborne particulates and improve comfort