Winix 115122 PlasmaWave Series Long Life Washable Filter, Size 21, carbon pre-filters(4),White;

The Winix 115122 replacement filter G is a one year true HEPA replacement.  The washable true HEPA filter captures 99.97Percent of particles and impurities as small as 0.3 microns, including pollen, mold, dust, pet dander and hair, other allergens and cigarette smoke. It can be washed up to 3 times in a year which, extends the effectiveness of the filter.  The genuine Winix filter G is compatible with Winix air purifier unit 5500.