I don't know, I think we can view it as something else. SPOILERS.
SPOILERS.
If anyone finished Spartan Ops, Halsey has left the UNSC and is working with the rogue Covenant now. Maybe Chief found out and defected as well and is using the cloak as a cover? Although he's like 7 foot or so so I'm guessing they could tell that its not a nomad or anything lol. It could also be symbolic of him being a lone traveler now that Cortana is gone. IDK Maybe I'm looking too much into it.
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