In this form, [[monkey d. luffy|Luffy's]] arms inflate slightly while most of the air appears to fill his torso. [[monkey d. luffy|Luffy's]] durability rises sharply in this form, as he was capable of tanking and deflecting a piercing strike from [[Charlotte Cracker]], whereas previously [[Charlotte Cracker|Cracker]] was able to cut deep into [[monkey d. luffy|Luffy's]] arm when Luffy was in [[gear fourth: boundman|Boundman.]]
gear fourth: tankman