Fitletic Race Bib Belt/Race Number Belt - Race 1 RACE BIB BELT: It can be used as a triathlon belt, trail running belt, marathon belt, ironman belt, 5k running belt, 10k running belt, or any other kind of race number belt.. COMFORTABLE: Ultra-soft dual-adjust waist belt is super comfy and lightweight.. SAVE YOUR SHIRT: No more ruining your race clothes with safety pins.. ONE SIZE FITS ALL: Stretchy fabric is adjustable to up to 60 inches.. HIGH VISIBILITY: Reflectors for night running safety..