Warning: Spoilers for Moon Knight.
Moon Knight is an unusual series in many respects for the MCU, with a focus on character and psychological horror that other parts of the franchise haven't really explored. That unique quality is embodied in Moon Knight's costumes in the series, which contain many hidden details that reflect the unusual nature of the main character and also hint at connections to Marvel Comics.
Many aspects of the Moon Knight costume from Marvel Comics have been translated into live-action, but much of the suit builds off the themes and stories from the Marvel Universe to create a visual marker for the strange dichotomy between Steven and Marc. The costume also hints at the extraordinary power of Moon Knight, which has yet to be fully realized in the series.
Made Of Adamantium?
In the series, Moon Knight is shown to be incredibly strong and durable in his costume. Some might wonder if that durability is courtesy of adamantium, the Marvel Comics metal comic book fans know Wolverine is laced with throughout his body. It's not.
In the comics, the armor is made out of carbonadium, a strong metal that is not as durable as adamantium but is much more flexible. That may be different in the MCU as vibranium is the metal of choice so far in the franchise. Khonshu is connected to Wakanda through the pantheon of Heliopolis, which includes several deities worshipped by Wakanda, including Bast.
Golden Accents
While there doesn't seem to be any adamantium in the costume, there are unusual golden accents throughout. The crescent blades are made of gold as are his shoulder pauldrons, which are difficult to see under the layered wraps of bandages.
The choice of gold isn't out of step with the Egyptian lore Khonshu is connected to, but it is different from Moon Knight's comic book origins. In his first appearance in Werewolf By Night #32, a Moon Knight comic fans should read in preparation for the series, he is using silver weapons to combat his werewolf opponent.
Endless Blades
In episode two of the series, Moon Knight reveals a powerful aspect of his armor. He pulls a pair of crescent darts from the one bound in wraps on his chest, but that blade remains. Through some mystical force, Moon Knight is able to draw on endless blades.
This is unfortunate for his enemies, especially the frightening hounds that have attacked him in the first two episodes. Moon Knight theoretically would never run out of weapons in the series, making him a one-man army in the MCU.
Weapons Are Hidden Everywhere
Moon Knight doesn't just have endless crescents in his chest. He also has them tucked into the bandages on his arms. These are smaller blades than the center one, but likely have the same infinite capacity as that one does.
The many layers of bandages covering Moon Knight suggest he likely has other similar weapons hidden throughout his costume. He doesn't necessarily need to hide them on his person though, as fans have already seen in the series.
Infinite Pockets
Just like Hawkeye seems to have an endless array of weapons in the comics, Moon Knight has a vast arsenal as well. It goes even further than some might think. In episode two, Moon Knight draws a pair of batons out of what appears to be his back pockets.
This suggests a couple of things. One, the Moon Knight armor is a mystical grab bag that can produce any kind of weapon at any time. Two, it's a conduit of sorts to a pocket or parallel dimension, perhaps that of Heliopolis, where Khonshu and the other gods reside.
Two-Faced
One of the most striking and most subtle aspects of the Mr. Knight version of the costume Steven wears in episode two is a nod to the division between him and Marc Spector. A scar runs down the face of his otherwise perfect mask, hinting at the cracked division of power between them.
The stitched scar is not present in the comic book Mr. Knight, a powerful Moon Knight version, and is likely an astute addition from a creative team that is leaning very heavily into the dissociative personality disorder that renders Moon Knight the sum of two very different parts.
Glowing Eyes
Comic book fans know Moon Knight is a supernatural character in many respects and the MCU is taking that concept and running with it. Moon Knight's eyes glow in his mask, but episode two reveals that Marc/Steven's eyes actually glow with the power of Khonshu.
When his eyes turn completely white, the Moon Knight suit is summoned. This hints at Moon Knight being either completely or partially possessed by Khonshu, which could be why the Steven personality is so bothersome to Khonshu's plans.
Mummy Wraps
The MCU Moon Knight costume is very similar in form to the comic book version with one major difference. It's primarily composed of wrapped bandages very evocative of Egyptian mummies. These bind the disparate elements of the costume together.
The wraps come out of nowhere when Marc Spector summons the Moon Knight armor, adding more credence to the idea that the armor and all its separate elements like its weapons are held within some kind of pocket or mystical dimension.
Earth X
This aspect of the costume was inspired by a variant of Moon Knight from the Earth X universe in Marvel Comics. Moon Knight writer Jeremy Slater mentioned on Twitter that the art of this character by Alex Ross inspired the creative team in coming up with the MCU look.
The Earth X version of Moon Knight had all the same powers as the regular Earth-616 version did and also was immortal. This could be the case in the MCU as well, given a cryptic line by Khonshu in episode two. He told Marc that he was "but a corpse" when they met.