A gas spring assembly that is suitable for use on a vehicle suspension system includes a first end member and a second end member that is spaced from the first end member. A flexible wall is secured between the first and second end members and at least partially defines a first gas chamber therebetween. A confinement at least partially forms a second gas chamber that is in communication with the first gas chamber. A porous flow restrictor is operatively disposed between the gas chambers. A suspension system including such a gas spring assembly as well as a method is also included.