Over the past year, weve had several requests from customers (including Ironman World Champ Craig Alexander!) for an easy way to attach a race number to our Helium belts. Since were such good listeners, we decided to introduce our Race number Attachment that will hold your bib number in place on any of our hydration belts! These are not only super lightweight, but they are incredibly reflective too. no more pins through your shirts or shorts just slide these onto your belt and go! Lace Locks included, belt loop on backside for easy attachment.