The filter pack includes 2 sets of white HEPA filters, each in its black filter casing. This is the same one as the original HEPA filter that comes with 'Dylon' cordless vacuum cleaner. It is washable and re-useable, however if it is not completely dried out, the vacuum suction will be reduced (due to the filter being blocked by water). Also for higher standards of air purification and reducing allergies, it is recommended to replace the HEPA filter every three months.