Race Bib/Number Magnets Supplied as a set of four pairs of magnets so you can attach each corner of your race number to your running vest/top.Ten great colours to choose from so you can match with your number, clothing or charity.One set will last a lifetime so a fantastic investment if you enjoy running.Strong enough to keep your race number in place even through thick clothing.Allows you to stop using safety pins that are easily lost, can damage your expensive running clothing and annoy you while running.