Disposable deep pleated air filter cartridge is specially designed to work in a Trion Air Bear whole house air cleaner. The filtering medium is made with synthetic mechanical filtering fibers. The medium is adhered to an expanded metal backing, deep pleated, and encased in a moisture-resistant kraft board frame. This highly efficient filter saves on energy costs with low airflow resistance and greater filtration surface that allows for greater dust holding. Effective against common household contaminants such as pollen, pet dander, mold, bacteria, virus carriers, household lint, dust mite debris, smoke, odors, dust/lint, smog, and microscopic allergens. MERV 11 level of performance. Lasts up to 1 year.