The HPP⁺ filter is capable of eliminating ultrafine particles (smaller than 0.1 micrometres, μm), allergens, pollen, mould, cigarettesmoke, exhaust gasses and more. The filter is made of an embossed polypropylene film, a self-charging electrostatic material,wrapped in a cylindrical shape, and the European patented design allows the polypropylene to hold charged sides. The powerful HPP⁺ filter technology removes bad odour with activated carbon. The performance of this filter is even more improved with the ION generator.