Abstract: A device, for holding a garment waistband, has a flat, elongated elastic band stretchable across two belt loops, and a pair of fastener components formed by metal wire bent to form a back bar for the elastic-band-mounting end and a hook-loop fastener end for hooking onto a post member mounted to the elastic band. The back bar is formed in a thin channel shape defining a concave cross-sectional gap with a thickness such that it can be seated around the exposed length of the belt loop and clasp it by its thickness. The device provides the wearer with a slimmer profile and is more comfortable to wear than a waist-length belt. The back bar may be formed with bar halves separated by a cut-away gap to allow the elastic band to be sleeved on and off, to interchange elastic bands and/or other decorative fastener components.