Steam Armour

Han wears this in order to use his steam-based ninjutsu. Along with covering his entire body, the armour contains a furnace in its back, where the steam is produced. The pressure resulting from the emitted steam can be used to increase the force behind Han's physical attacks. As more steam is released the pressure is increased significantly, resulting in a tremendous amount of force behind his physical attacks. For example, when kicking Naruto Uzumaki away, just catching him resulted in Killer B being knocked back a large distance by the force of the kick.