Thread:Ain Soph Aur/@comment-5306586-20120725002614/@comment-5306586-20120731205926

I believe it stems from the fact that the possessor's skin is a defense in itself as it is difficult to cut or rip. This is why the 3rd is able to teleport via Heavenly Transfer without being "ripped to shreds" since his skin could withstand the various pulls and pressure of the transportation. If one only needed a massive amount of strong muscles to attain "immense" durability, then just about any muscle man would be able to teleport via HT, which they cannot. This is explicitly stated by Mabui when Tsunade wanted to travel via HT, and was told "your flesh won't be able to handle the speed, you’ll be ripped to shreds!" She then goes on to explain that the reason the 3rd was able to teleport was because "his flesh was like steel, and his blood like iron." (Here is a link to pages 7-8 from chapter 562: http://www.mangahere.com/manga/naruto/v59/c562/7.html ). The 3rd's skin was even able to withstand the cutting abilities of the rasenshuriken without signs of visible surface damage. Though for the sake of the RP this aspect shall be toned down.

The fact that he also has beastly strength and the bone structure to not be internally crushed due to enormous amount of force from Naruto's attack however, is another story all together as I’m pretty sure that directly relates to his large stature.