Abstract: A safety device for a motor vehicle comprising an inflatable curtain having an upper edge and a lower edge. The upper edge is to be mounted within the interior of a motor vehicle. A first portion of an elongate, flexible element such as a cord extends from a mounting point on the lower edge over a pulley to a sliding ring. A second portion of the cord extends from the mounting point through a guide round a lower pulley through the ring to a lower anchoring point. As the inflatable element inflates so the mounting point on the lower edge moves downwardly, and a triangle of tension is created between the upper pulley, the lower pulley and the mounting point.