Filtered cigarette incorporating an adsorbent material

A cigarette comprising a rod of snuff (12) and a filter element (20) connected to the rod snuff (12), said filter element (20) proximal to the rod snuff end (12) and a distal end rod snuff (12), wherein said filter element (20) comprises: a first section, extending longitudinally of filter material (38) located at the end of the filter element (20) next to the rod snuff (12); a second section extending longitudinally of filter material (36) located at the distal end of the filter element (20) of the rod snuff (12) and spaced from said first section of filter material (38), defining the two sections of filter material (36, 38) a compartment (32) therebetween; and a semipermeable wall (42) dividing said chamber (32) in a first section adjacent said first filter material region (38) and a second section adjacent said second region of filter material (36); wherein said second region of said compartment (32) containing an adsorbent material (34) and said first region of said compartment is empty, or one of said first and second regions of said compartment (32) contains an adsorbent material (34) and the other of said first and second regions of said compartment (32) contains an ion exchange resin (50).