Flexible spring members can include a flexible spring wall and at least one girdle hoop. The flexible spring wall can include a plurality of convoluted wall portions disposed in longitudinally-spaced relation to one another. The girdle hoop can take the form of an annular ring that is at least partially formed from a non-metallic material and can be positioned longitudinally between adjacent ones of the plurality of convoluted wall portions. The girdle hoop can be at least partially embedded within the flexible spring wall and can operate to substantially inhibit radially-outward expansion of the flexible spring wall during inflated conditions and/or use. Gas spring assemblies and methods of manufacture can include one or more of such flexible spring members.