Dual-stage, long life Premium Air filters are made of chemical resistant, high quality polyester-based foam. Heat-laminated, dual-stage design allows for superior filtration by eliminating the passage of fine dirt and dust, while helping to prevent airflow blockage. Special reticulation process offers unsurpassed airflow and filtration. Permabond ultra-high strength seams increase the integrity of the filters wash after wash. Packaged individually in a resealable bag **All Clearance and Open Box Deals are FINAL**