Sometimes it's superstition, other times it is for intensely personal reasons - every driver has to have one and where there's a number there's a back story. For more F1® videos, visit http://www.Formula1.com/ Follow F1®: http://www.instagram.com/F1 https://www.facebook.com/Formula1/ http://www.twitter.com/F1 https://www.twitch.tv/formula1 https://www.tiktok.com/@f1 #F1