While it may only come to mind rarely during your day to day life, the air you breathe is constantly mixing, swirling, and picking up contaminants around you. Whether you suffer from allergies, sneeze or cough because of dust particles, or have odors from family pets, the air filter you select can have a large impact on your comfort. Shop from a wide range of air filters by Tier1. We offer most common sized filters in a couple of MERV options depending on your needs.