An aerosol provision system (500), such as an electronic cigarette, comprises an aerosol source (502) for generating an aerosol from a source liquid comprising a liquid formulation, for example containing nicotine, is described. The system comprises an air channel (520) arranged between the aerosol source and a mouthpiece opening (516) through which a user inhales the aerosol during use. The air channel is defined by a wall, and at least a portion of an inner surface of the wall is provided with a surface finish to increase the wettability of the surface to the liquid formulation. For example, a part, or all, of the inner surface of the wall of the air channel may be provided with a textured finish. The textured finish may be provided during a moulding process for the air-channel component(s) of the aerosol provision system during manufacture, for example. Increasing the wettability of the air channel can help reduce the likelihood of the aerosol condensing into droplets of the liquid formulation on the walls of the air channel and being drawn into a user's mouth therefrom.
