Built with electrostatically charged fibers to attract and retain micro-particles in the air so you can breathe easy below deck. Breathe Easy Air Filters are excellent for capturing diesel smoke, dust, lint, bilge odors, and pet dander from the air, freshening your boat's cabin. They have been found to be eight times more effective than ordinary slide-in mesh screen air conditioning filters at capturing airborne micro-particles not visible to the eye. They are easy to install and work on all types of air conditioners. Key Features Easy to install Keeps the air in your boats cabin fresh and clean More effective than slide-in mesh screen filters Efficient and disposable Selection is simple. Measure the width and height of the evaporator face of your air conditioner and refer to the sizes listed.