Talk:Mesa (Warframe)/@comment-83.7.33.110-20141217180632/@comment-72.77.72.224-20141219175349

-Spoilers-

The "exoskeleton armor" line was erased from canon a while ago. If you played through Limbos questline, Ordis says at the end how you will "Inhabit this warframe". This is accompanied by Vor's statement of how the "Tenno are the energy". Basically, the Warframes are metal bodies that the ghost-like energy called the Tenno inhabit to have a physical presence.

That being said, they can wear clothing all they want to. If you had a metal body exposed to the elements all the time, you'd want some clothes to keep warm as well!