Indoor air quality is an important issue for all of us. With homes and new buildings being built more efficient, the need for improving the air you breathe inside is critical. Clean air is good for everyone especially those with chronic respiratory issues as well as sinus and allergy suffers. Upgrading your air filter is a major step in improving your indoor air quality. The Practical Pleat is one of the easiest steps you can make for improving your IAQ (indoor air quality). The Practical Pleat is 5″ thick with a foam gasket to seal in the return frame for improved filtration, by preventing air by-pass. The greater filter surface is more efficient than a standard 1″ filter plus it last 6-12 months. Available in MERV 11, MERV 14 and a 2″ MERV 8. Upgrade your filter today and breathe easier tomorrow.