A smoking article, characterized in that it comprises: a First Section and a second section Filter, Filter is located downstream of the first Filter Section, where the first section Filter comprising a material with a First Pressure drop per unit length.The second section Filter comprising a material with a Second Pressure drop per unit length and the second Pressure drop per unit length is greater than the first Pressure drop.

摘要

A smoking article comprises a first filter section, and a second filter section located downstream of the first filter section. The first filter section comprises a material with a first pressure drop per unit length, the second filter section comprises a material with a second pressure drop per unit length, and the second pressure drop per unit length is greater than the first pressure drop per unit length. The smoking article comprises a ventilation system configured to selectively provide ingress of a variable level of ventilating air.