From Halopedia, the Halo wiki
The harness is simple, sleek, and efficient. The helmet covers the full span of the face offering some protection to it. The harness also has form fitting greaves so they fit comfortably for the user.
The Storm harness is most often issued in blue, though green, red, white, and gold harnesses are sometimes used instead.
Swords of Sanghelios variant
Jul 'Mdama's Covenant variant
Jul 'Mdama's Covenant Storm troops were known to use less sophisticated armors than usual, for example without the arm guards. Unlike the full armor-set worn by the Swords of Sanghelios where the armor covers the whole body, the Storm armor in Jul 'Mdama's Covenant often leaves its wearers arms exposed. Significantly less affluent than the original Covenant Empire, Jul 'Mdama's Covenant was not outfitted like standard military.
After spending several centuries creating parts for other Sangheili harnesses. Lodam Armory put together their efforts and made the Storm harness as its first fully in-house armor system alongside a Ranger derivative of the suit.
The harness was used by the original Covenant during the Human-Covenant War, where it was used by Storm shock troopers keeping the peace on frontier worlds. It saw much more widespread adoption among both the resurgent Covenant and the Swords of Sanghelios after the war among less specialized forces.
List of appearances