Inflation control apertures in airbag partition

The air-bag comprises three super-imposed fabric layers (2,3,4), the outer peripheries of which are conjoined by a seam 5. A central aperture 6 in the lower-most layer receives the gas outlet (8) of the gas generator. A plurality of apertures 12 are formed in the intermediate layer and seams 13 interconnect the intermediate and the lower layers adjacent the apertures. The seams 13 partially surround each aperture, but are not present in a region 14 which is radially outwardly positioned relative to the centre of the intermediate layer. This arrangement causes the gas to follow radial path 16 and to inflate the bag outwardly before inflating towards the occupant of the vehicle.