The ODST body armor is a signature piece of equipment used by the Orbital Drop Shock Troopers. The suit, which is produced by Misriah Armory, is vacuum-rated and is capable of extra-vehicular activity for fifteen minutes. The armor provides numerous advantages in the field, including ballistic protection, temperature control, as well as thermal insulation against extreme temperatures experienced during atmospheric entry and thermal protection from Covenant energy weapons.
The ODST armor has gone through several design changes since the start of the Human-Covenant War. The current version incorporates technology initially developed for the MJOLNIR Powered Assault Armor, most notably the helmet. This also includes ceramic-titanium composites for armor plating to give the user added protection. It features a heads up display and communications systems, notably the Visual Intelligence System, Reconnaissance, to give more situational awareness to the wearer.
The ODST BDU has been in use since the Insurrection, if not earlier, and remains unmatched in its ability to protect its wearer over other BDUs during the toughest operations. The BDU excels at providing more protection against small arms fire than other infantry body armor, and also excels at allowing a trooper to conduct Military Operations in Urban Terrain (MOUT) without little chance of being detected in dark locations. The BDU's stealth capability is partly thanks to its black and gray camouflage patterns on the legs, boots, gloves, chest, helmet and undersuit - these urban camouflage patterns are optional; without the camouflage panels, the BDU is black. On the left shoulder pad of every ODST is a UNSC MED REF patch. This patch contains basic medical information about the trooper, and allows a certified medic to gain a quick medical reference to an ODST wounded in the field. Despite the armor's obvious advantage over standard infantry armor, it is still vulnerable to Covenant energy weapons, larger armor piercing rounds, and large explosive devices.
 Armor variants
While the standard ODST BDU is fully capable for any role, there are specialized variants of the BDU - these suits are specifically issued to a specialist of a certain field to provide them certain advantages during an operation. As such, specialized gear is only available by Mission Conditional Requisition (MCR). Depending on mission requirements, an ODST operative may request either additional, or variant equipment that ranges from helmet attachments, gloves, battery, equipment or communication rucksack. The following is the specialized battle dress uniforms currently in use by the Navy.
 ODST/UA Personal Protective Equipment
An up-armored variant of the ODST BDU, the ODST/UA PPE is issued to personnel whose specialization requires extra armor, such as demolition experts. This version of the battle armor is specifically designed to aid an ODST in CQB-type combat conditions. The standard left pauldron is replaced with a longer two-piece ballistic plate, which aids in protecting the trooper's upper body while in a firing stance, and also to reduce severe injury from plasma-based weaponry. The helmet is also issued with an optics device that aids the user in relaying images and video to teammates or command.
The sharpshooter BDU is issued to sniper experts in the field. This BDU is designed to give an ODST sharpshooter more freedom in combat - the standard right pauldron is removed, allowing the sniper to aim better and move his arm more freely with a sniper rifle, while the standard left pauldron is replaced with a larger plate to protect the sniper's arm from counter attacks. The sharpshooter variant is also issued with an O/I (ocular/integration) optics device attached to the helmet, while the Oracle scope on the SRS99 can be smart-linked to the user's HUD.
 ONI/S-1 Recon BDU
The S-1 reconnaissance PPE/BDU is a specialized Office of Naval Intelligence variant of the ODST armor. The armor is only issued to ONI reconnaissance agents for high risk operations. The undersuit of the armor, which is superficially similar to the standard ODST armor, is designated as the S1/ONI field fatigues. However, the chest plate is replaced with a specialized one, to provide stealth capabilities with little or no loss of endurance, specifically by reducing its IR signature and reflective surfaces. The torso part of the armor also varies from the standard version, having a green, translucent orb in the center. There are no shoulder pauldrons issued with this variant, which allows more freedom of arm movement.
 MJOLNIR GEN2 variant
After the instatement of the Spartan branch, numerous Orbital Drop Shock Troopers transferred into the SPARTAN-IV Program. Almost inevitably, the first-generation MJOLNIR/ODST variant was updated for compatibility with MJOLNIR (GEN2). Despite considerable differences from the standard version of the armor, the system contains many features expected of Special Forces gear, making it desirable for use by former ODSTs. It was manufactured by Cascade Stronghold Technologies and tested at Mindoro, Lhopat on Cascade.
The GEN2/ODST variant shares several design elements with its predecessor, though it also sports several changes. It still uses the standard helmet and shoulder pauldrons; it also features upgraded versions of the Mark 117 chestplate and the M/LBE Hard Case. However, the chestplate covers more of the torso below the thoracic cavity. The rest of the armor, including the greaves and cuisses, gauntlets, and boots, is more closely derived from the regular MJOLNIR (GEN2) milieu.
 Armor components
The ODST battle dress uniform is comprised of several different components and layers that make the suit what it is, while technology from other projects across the military have been incorporated into the suit, ODST equipment still has proprietary technology that has not been adopted into other equipment for the military.
The ODST helmet is derived from the standard-issue CH252 helmet. The modern version of the helmet was adapted for use with MJOLNIR; the technological advancements made, such as CTCs, were incorporated back into the ODST helmet's regular production. It is made of titanium and is coated with a heat-resistant material to help disperse heat - the inside is lined with black padding to provide comfort when the user is wearing it. The helmet's faceplate is made of a strong, glass-like material with the ability to polarize. When polarized, the helmet's faceplate has a bluish silver color and obscures the wearer's face completely. However, the ODST helmets worn by the SPARTAN-IIs during their training had a golden-orange polarization, and Michaels wore a red-polarized helmet during the Battle of Ariel. There is also an up-armored variant of the standard helmet designed for close-quarters combat, designated as the ODST-HS Combat Helmet.
The helmet provides excellent protection against small-arms fire and small explosive attacks. The helmet is also essential in providing an ODST the ability to perform EVA and also provides a Heads Up Display, giving the wearer basic information including a targeting reticule, weapon information, ammo capacity, and basic health readout. The newest version of the helmet integrates with the user's standard neural interface to provide more tactical data to the HUD. Helmet-integrated neural interfaces is another piece of technology that has seen widespread adoption from Project MJOLNIR. Along with this state-of-the-art equipment, the helmet is also equipped with its own thermal imaging and motion sensors. There are also several external optical modules that can be attached to the helmet, including the ODST-CNM used by some squad leaders or an optical/integration module which enhances smart-linking capabilities and communication systems.
Due to its cross-platform nature, the ODST helmet may also be worn with other armor systems. SPARTAN-IIs wore ODST helmets in conjunction with their body suits during their training and on their first combat mission.
- Main article: Visual Intelligence System, Reconnaissance
The Visual Intelligence System, Reconnaissance, or VISR, is issued with the ODST helmet. The VISR proprietary data management suite enables a user to link into UEG, CAA, and UNSC infrastructure systems at the local, national, and global levels - however actual access level is administered on a need/rating basis. This allows the user to store and review mission content up to 610MB combined, the system also provides street level navigational data, and receive secure real-time mission data. In addition, every current issue helmet ODST BIOS A29.817941B.01 or later is equipped with low-light vision enhancement, which outlines hostile units in red, friendlies in green, weapons in blue, and objects of interest in yellow.
 Body suit
The ODST body suit is comprised of several different layers and materials. The inner layer of the black-gray undersuit is made of Kevlar to aid in protecting the wearer from small arms fire. The inner layer contains a heating and cooling system which regulates temperatures to keep the user warm or cool depending on the weather conditions - the heating and cooling system can also match infrared signatures of the current weather as well to allow an ODST to go undetected in hostile locations. The outer layer of the undersuit is coated with a heat-resistant material to aid in reducing temperatures experienced during orbital drop, and against Covenant plasma weapons. The body suit also doubles as a pressure suit to allow an ODST to perform extra-vehicular activity.
 Armor plating
As with the helmet, the Mark 117 chest plate is comprised of titanium and ceramic materials. It covers the chest from the bottom of the clavicle to the bottom of the rib cage, with another segment protecting the abdomen. Some body suits feature an armored collar that protects the wearer's neck, complementing the chest plate's coverage. A pair of wide, low-profile shoulder pauldrons are featured, though some ODSTs, such as snipers or CQB specialists, may opt for an alternate model or none at all. The shin and knees are well protected with titanium-ceramic guards, as are the forearms.
Designated as the M/LBE Hard Case, the rucksack issued to ODSTs is, for all intents and purposes, an armored backpack that attaches to the back of the armored vest. The rucksack comes in a number of different variants. The main purpose is storage, which allows a trooper to store equipment, ranging from ammunition, to medical supplies, to explosives, to battery packs which provides power to any equipment an ODST may carry, and communications, which houses the necessary radio and satellite gear that an ODST squad requires to report in to their superiors. For longer missions, ODSTs can carry larger rucksacks with enough supplies for two weeks of operation without external resupply. Rucksacks have integrated magnetic holding devices to allow for external back mounting of additional equipment. Equipment with magnetic properties, such as longer weaponry, can be carried externally over the rucksack eliminating the use of extra straps or slings. Because the rucksack's casing is armored, it gives the ODST wearing it an additional layer of protection from behind.
 In-game armor permutation
 Halo 3
The ODST helmet is available as an armor permutation in Halo 3 multiplayer. The SPARTAN version of the helmet differs from the standard version in the polarization color of its visor; regular ODST helmets have bluish-silver polarization, while the MJOLNIR ODST helmet retains the gold electroplating possessed by most MJOLNIR armor. It is unlocked by earning the Spartan Graduate achievement, or by earning 5 XP in Matchmaking.
 Halo: Reach
In Halo: Reach, two upgrades are available for the helmet. The first, (UA/CNM), adds an up-armor plate with a Command Network Module on the left side, and the second, (CBRN/HUL), adds a Chemical, Biological, Radiological, and Nuclear Module with a Hardened Uplink Module on the right side. The shoulder pauldrons, breastplate, and helmet of the ODST armor are also available for purchase in the Armory. Unlike in Halo 3, the ODST armor can be used in all game modes.
 Halo 4
- The ODST armor is derived from the first concept of the MJOLNIR armor. This original concept by artist Shi Kai Wang was scrapped because it made the Master Chief look "too mean."
- The visor's ability to polarize, the VISR mode, and the HUD it displays may mean that the helmet has a transparent Organic Light Emitting Diode (OLED) coated screen.
- The Good Samaritan achievement unlocks the ODST armor for the player's Xbox Live avatar if the user has Halo Waypoint. The helmet cannot be removed, rendering any avatars wearing it completely anonymous.
- The armor worn by the squad in Halo 3: ODST have the exact same scratches and burns, due to the reuse of the same basic in-game model for each character.
- On the cover of Ultimate Comics: The Ultimates Volume 1 #4, General Nick Fury and several S.H.I.E.L.D. agents are seen wearing armor that is very clearly inspired by that of the Orbital Drop Shock Troopers.
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 List of appearances
- ^ a b c Halo: The Essential Visual Guide, page 53
- ^ Halo: Reach, ODST helmet in-game model
- ^ Halo: The Cole Protocol, Chapter 4: page 48, Chapter 5: page 56
- ^ a b Halo: Reach: ODST helmet Armory description: "Many technologies initially developed for MJOLNIR have gained widespread adoption."
- ^ a b c Halo 3, Armory
- ^ We Are ODST
- ^ a b Halo 3: ODST
- ^ Halo: Landfall
- ^ Halo: The Essential Visual Guide, page 123
- ^ a b Halo: The Essential Visual Guide, page 159
- ^ a b Halo Encyclopedia (2011), page 56
- ^ a b Halo: The Essential Visual Guide, page 45
- ^ Worthplaying Halo 4 (X360) Champions Bundle To Add New Maps, Mode, Skins, Armor, Bonus Upgrades
- ^ The Halo Bulletin: 7.10.13
- ^ a b Halo: Fall of Reach - Boot Camp
- ^ Halo: Helljumper, Issue 2
- ^ a b Halo Encyclopedia, Chapter 2: page 57
- ^ Halo: The Essential Visual Guide, page 26
- ^ Halo 3, ODST helmet description
- ^ Halo: Reach, Armory, MJOLNIR AA variant description: "The MJOLNIR/AA variant was developed as an improvement of the venerable ODST helmet."
- ^ Halo: The Essential Visual Guide
- ^ Bungie.net: Halo 3: ODST Field Guide
- ^ Halo 3: ODST and Halo: Reach in-game models
- ^ The Life and Halo 4: Forward Unto Dawn live-action models
- ^ Halo: Reach
- ^ Halo: The Flood, page 58
- ^ The Art of Halo 3