http://halo.wikia.com/wiki/Mjolnir_Powered_Assault_Armor

 

The power armor in the Halo franchise has a external shell made of titanium metal. The under armor is comprised of different metals along with a titanium alloy, with a gel innard. The suit can inhance the user’s speed and strengths along with reflexes. The suit also uses crystals to connect to the suit and wearer’s mind to unite the two and be more effective. The suit has an advanced HUD (Heads Up Display) with is connected to the gloves of the suit to detect the weapon type, ammunition, equipment, shield strength, health status, and can display a targeting reticle, waypoint and has radio uplink. The suit is resistant to EMP and radiation, and can filter the air and clean bacteria from the suit. It is also moisture absorbent and can withstand plasma projectiles. Mjonir can house an artificial intelligence that “piggybacks” on the suits crystals and aid the wearer in combat.