What is kakazu mask's body made out of ?

me and my friend were wondering what his mask's bodies where made out if best answer get 10pstWhat is kakazu mask's body made out of ?
Hearts.... of 4 Ninjas... All those being able to use either Wind, Water, Lighting and Fire... and I think Kakuzu's is Earth since he can harden his body with earth element technique... All 5 hearts need to be destroyed or Kakuzu isn't dying... that's what will be revealed in the next episode...


I think they're made of all those threads that's in Kakuzu's body... He isn't entirely immortal... One heart was destroyed by Kakashi... 3 more hearts remain... plus 1 which is his own....


4 of them are out of his body... 1 of them is dead... so 3 remain... outside... those need to be destroyed and then the one that's in him.. his own heart...





EDIT!! that's what I think too... It's those threads... They're unlimited.... since he uses them to stitch up his partners' body parts...What is kakazu mask's body made out of ?
they are 5 (inclunding kakuzou), each one resembles an element, the one with the water element was destroyed by kakashi麓s chidori, it looks like that they are made of tar, mud or a viscous fluid ( the warriors except kakuzou)