A triathlon number belt is necessary to keep your race number in place during the race. Wear the number on your back for the bike leg, then swivel it around to show the number on your front for the run.
Simply fasten your number to the belt using the poppers provided and off you go.
Using poppers instead of bulky toggles has the advantage that you are able to wear this belt under your wetsuit. The thin buckle also helps to make this belt more comfortable under your wetsuit than belts of other brands.
This number belt as an adjuster to shorten or lengthen the belt as required.