heelys boy's propel 2.0 (little kid/big kid/adult) black/white 6 big kid heelys what are heelys? they are shoes that roll! these one of a kind, powerful, lightweight athletic shoes feature a single, stealth wheel housed in the heel, allowing athletes of all skill levels to walk, run and transition to a roll at any moment. roll into all situations, or simply remove the wheel and transform your heelys into a pair of fashionable street shoes!