BIBUP 3.0 Magnetic RaceBib Fixing System 5 Couples !!! BIBUP 3.0 Magnetic starting number attachment system lighter and easier to use - NO NICHEL ALLERGY PROBLEM Never lost power-- no more pin holes in your favorite technical tee The powerfull on the market .... 2011 PATENTED -- ITALIAN DESIGN By Mechetti Giovanni WITH COVERED AND PROTECTED MAGNET