The RIDGID 5-Layer replacement allergen filter is made from HEPA-rated material and removes 99.97% of all particles 0.3 microns and larger from the air. Allergens cleaned from the air might include particles such as pet dander and pollen. With its patented Qwik Lock feature, it simply snaps on or off the vacuum for easy cleaning. Features Fits all RIDGID vacs 5 gallons and larger.Washable and reusable.Includes 1 filter per package.Not EPA RRP qualified.Best for - Sawdust. Typical basement, garage or car dirt. Drywall dust. Cement dust. Cold ashes (fireplace, BBQ grill). Fine powders (flour, talcum powder, baby powder, chalk). Pet dander. Pollens. Allergens. Fine indoor particles (upholstery, dust mites, mold spores, dryer lint, furnace filter).