In order to keep your plants strong, healthy and growing to their full potential they need a pollutant free environment. The Phresh Intake Filters take care of this for you. After simple installation, you can sit back while they filter out 99.9% of pollutants including bugs, dust, mould, pollen and mites – they even remove low grade exhaust fumes. Their unique patented design of carbon pleats ensures they have the largest surface area possible in order to deal with a high volume of air flow while filtering out those nasties efficiently. Why spray your plants with expensive and damaging pesticides when with the Phresh Intake Filters there's no need. What's more, they're 100% recyclable.