The Standard Spartan Armor was the main armor variant that Spartans were using. It was the most protective and effective armor GDI had ever made.
This armor was the most technologically advanced armor that UN had ever made, providing extreme protection to any Spartan from light firearms and small protection to heavy firearms. Millions of dollars were spent in research to reach its final version. When activated, the armor communicates with the nearest GDI base, sending the vital statistics of the Spartan at any given time. Apart from that, it has also lots of equipment devices in it such as a camouflage that can make the Spartan invisible for a while, small binoculars and extra ammo for the AK80 with frag grenades.