Audi Genuine dust and pollen filters prevent pollen and fine dust particles from unduly penetrating the vehicle interior. Using a multi-layer filtering system, large dust and soot particles are trapped via the pre-filter while fungal spores and pollen is retained by the second layer. Designed to be replaced at each scheduled service interval, Audi Genuine dust and pollen filters not only work to minimise odours and allergy symptoms but also help protect your air conditioning system.