ODST armor
From Halopedia, the Halo wiki
The ODST combat armor or Body Suit, although similar to standard marine armor, and used by the SPARTAN-IIs before they got their MJOLNIR amour, is a specially designed suit. The suit itself is composed of a helmet, body armor and boots/gloves, and a back piece. They could deflect a small caliber round, one smaller than a Pistol. They have refrigeration and heating units that mask infrared signatures. The body armor and boots/gloves are fully encased and are air tight, making them capable of use in a vacuum. The integrated helmet has encryption and communications gear, a Heads-Up Display, and thermal and motion detectors. When sealed, the unit has a fifteen minute reserve of oxygen to let the wearer survive in vacuum.
Appearance
The helmet's appearance is much like that of the marine armor, but is fully encased and has a wide "v" shaped visor that is reflective blue. The helmet is flat black. Body suits are the matte black, form fitting, lightweight polymer body armor. The body armor has a black and gray camouflage pattern on the limbs, and flat black on the torso and boots. The armor has a total of six pouches on the waist, four smaller pouches on the chest, and two large holster-style pockets on each hip. The back piece is shaped like a small backpack, and contains a pressurized air tank that can supply the user with clean air for a total of 15 minutes. Below the back piece, there is a small solid sheath that can hold a combat knife.
Disadvantages
Unfortunately, the suits are uncomfortable over prolonged periods of time and tricky to repair in the field.
