A smoking article includes a sheet material (10) comprising a fibrous layer (12) formed of cellulosic fibres and at least 50% by weight of inorganic filler material having a particle size in range of from 0.1 microns and 50 microns, wherein the sheet material has a tensile strength of at least 900 N/m. The fibrous layer (12) preferably further comprises a binder material, preferably an organic binder material such as a cellulosic binder material. A coating layer (16) may be provided on at least one side of the fibrous layer 12).