Marathon Bibs also called Marathon Numbers/ Running number bibs have the race day number printed (or name, as required) on them. These are generally printed on a Non-Tearable Recyclable media. The runners wear such BIBs on the race day. Each BIB has a different number printed on it. This is a perfect example of variable data printing (VDP) projects that we have been doing for the last few years and have gained expertise in.