Abstract: Ventilated cigarettes are made with a tip zone consisting of tobacco or a filter or a hollow tip, which contains, in the wrapper or wall, at least one ventilation zone. In the tip zone or between it and the tobacco roll, or in the latter, there is placed an element which consists of polymeric, not crimped spun fibers and/or filaments, which may have the shape of a disk. This element is arranged in such a manner that it is located behind the ventilation zone, when seen from the end of the tip zone facing the mouth. The spun fibers and filaments have, respectively, a diameter between 0.1 and 20 .mu.m and lie generally transverse to the flow of the tobacco smoke.

Abstract: An additive for smoking tobacco products and their filter elements is described which comprises an intimate mixture of at least two highly dispersed metal oxides or metal oxyhydrates, mixtures thereof or a mixture of different forms of the same metal oxide or metal oxyhydrate, the mixture exhibiting liquid-like properties anomalous for a mixture of solids, and specific properties of the mixture, such as the bulk density, the surface area, the flowability and the absorption capacity for gases and vapors not representing an additive value of the proportions of the mixing components, and the absorption capacity for toxic substances in the tobacco smoke being synergistically increased.