* Premium Air Vent Filters - Made from high-quality and safe material, engineered to effectively purify the air you breathe from your AC units and heaters, also prevent dirt and other objects falling into the air vents * Electrostatically Charged Air Filter - Self-charging electrostatic air vent filters, act as magnet to hold dust, dirt, pollen, smoke and unwanted particles in the air you breath everyday. Reduce your dusting and cleaning work every week! * Experience Fresher & Relaxing Air - Unique air vent register filter not just purifying but you can drop a few drops of your favorite essential oil to the air filter to creates scented and relaxing atmosphere for your home and office * Easy Installation - Simply insert these air vent filters into floor air vent registers and also for ceiling vent filter, fit to most standard 4x12 inch size vents.