Abstract: The present disclosure provides an aerosol-forming article comprising an aerosol-forming substrate and an axially adjacent, downstream filter arrangement. In some implementations, the filter arrangement comprises an upstream filter element, an intermediate filter element and a terminal filter element. The upstream and terminal filter elements may be independently selected from a solid filter element and a hollow bore filter element. The intermediate filter element may be a hollow bore filter element having a greater bore diameter than any other hollow bore filter element in the filter arrangement.

Abstract: The present disclosure relates to an aerosol-forming article (e.g., a smoking substitute article such as an HNB consumable) comprising an aerosol-forming substrate and a filter element wherein the filter element is at least partly circumscribed by a flavored sleeve.

Abstract: The present disclosure relates to smoking substitute consumables, including an aerosol-forming article comprising an aerosol-forming substrate and a terminal filter element at a downstream axial end of the article/consumable. The terminal filter element may comprise a hollow bore extending from an upstream axial end of the terminal filter element to a downstream axial end of the terminal filter element. The hollow bore may be off-set from the axial centre of the terminal filter element.