The filter is made of a reinforced pleated media designed to capture particles down to the micro particle level. The large surface area improves the efficiency of its dust-holding capacity. The unique construction of our filters requires less energy for lower energy cost. Its electrostatic charge helps attract particles “magnetically” that otherwise would pass through. Housed in a recyclable clay-coated moisture resistant frame, this filter captures particles as small as 0.3 micron. In comparison, a human hair is approximately 100 micron in size. Our filters are effective against the following contaminants: dust/lint, airborne dust mite debris, pollen, pet dander, mold spores, bacteria, microscopic allergens, virus carriers, and odor, most smoke and smog particles.