Right, let's clear something up - Chief's armour design from 3 to 4, and the use of nanotech. Was Chief's armour upgraded by Cortana whilst he was in cryosleep? Because I've just been debating this on /r/Halo. Do you consider the nanotech explanation as canon? The Halo 4: Essential Visual Guide states that his armour was fully updated by Cortana, and that it now resembles an earlier iteration of MKIV. Frankie acknowledges the use of nanotech on his armour by Cortana. Chief wears a [url=http://halo4nation.com/news/halo-bulletin-9-5-12-pax-qa/]"very fancy, very custom, very unique "Cortana special" armor".[/url]