Bikers can be recognized by their "colors," the denim or leather vests they wear. The backs of these vests display their patches, which identify the clubs to which they belong. In the culture of outlaw motorcycle clubs, bikers' colors announce to the world who they are. Patches not only identify a biker's club, but may reveal other characteristics about the person wearing them. In the outlaw world, some patches may detail a biker's criminal exploits.