Includes 1 Foam + 1 Felt Filter - Comparable to Part # XFF350. Designed to fit Shark Navigator Life-Away Upright Vacuum Cleaners, including Professional Uprights and Deluxe Cleaners (please see models below). Helps effectively filter airborne irritants such as smoke, pollen, dust, mold spores, pet dander and fabric fibers. Recommended checking/replacing filter every 1-3 months for optimal performance of your vacuum. Brand New, By LifeSupplyUSA.