A method of producing smoking articles, the method comprising the steps of: providing a continuous array of first filter members, second filter segments and tubular members, wherein a tubular member is provided between each pair of consecutive first filter members and wherein a second filter segment is provided between each first filter member and each tubular member, each second filter segment containing one or more breakable capsules, each breakable capsule comprising an outer shell and an inner core containing an additive; wrapping the continuous array of first filter members, second filter segments and tubular members with a continuous sheet of plug wrap to form a wrapped filter array, wherein the plug wrap has a basis weight of less than 90 grams per square metre; cutting the wrapped filter array at an intermediate position along each first filter member to provide multiple filter rods, each filter rod comprising two first filter segments, a tubular member positioned between the first filter segments and a second filter segment provided between each first filter segment and the tubular member; providing a tobacco rod in axial alignment with and adjacent to each first filter segment of a filter rod; wrapping the filter rod and a portion of each tobacco rod in a tipping wrapper; and cutting the tipping wrapper and the filter rod at an intermediate position along the length of the tubular member to form multiple smoking articles, each smoking article comprising a tobacco rod connected to a filter, wherein each filter comprises a first filter segment downstream of the tobacco rod, a second filter segment downstream of the first filter segment, and a hollow tube segment positioned between the second filter segment and the mouth end of the filter, the hollow tube segment defining a cavity at the mouth end of the filter. providing a continuous array of first filter members, second filter segments and tubular members, wherein a tubular member is provided between each pair of consecutive first filter members and wherein a second filter segment is provided between each first filter member and each tubular member, each second filter segment containing one or more breakable capsules, each breakable capsule comprising an outer shell and an inner core containing an additive; wrapping the continuous array of first filter members, second filter segments and tubular members with a continuous sheet of plug wrap to form a wrapped filter array, wherein the plug wrap has a basis weight of less than 90 grams per square metre; cutting the wrapped filter array at an intermediate position along each first filter member to provide multiple filter rods, each filter rod comprising two first filter segments, a tubular member positioned between the first filter segments and a second filter segment provided between each first filter segment and the tubular member; providing a tobacco rod in axial alignment with and adjacent to each first filter segment of a filter rod; wrapping the filter rod and a portion of each tobacco rod in a tipping wrapper; and cutting the tipping wrapper and the filter rod at an intermediate position along the length of the tubular member to form multiple smoking articles, each smoking article comprising a tobacco rod connected to a filter, wherein each filter comprises a first filter segment downstream of the tobacco rod, a second filter segment downstream of the first filter segment, and a hollow tube segment positioned between the second filter segment and the mouth end of the filter, the hollow tube segment defining a cavity at the mouth end of the filter.