In late 2552, as the Covenant lay siege to humanity’s home system, ONI security personnel were deployed with AIR ASSAULT-class armor. The goal was simple: prevent the enemy from gaining control of the skyhook defense complexes that line the suborbital planes of both Earth and Luna.
I like the Air Assault Armour, I’ve used it myself. It suggests ODST origins but with added protection and sleek, subtle lines.
None, which is a pity. It would be good if the Halo 4 armour choices had an impact on gameplay. With AA armour, it could provide greater speed or resilience when used in aircraft, providing a slight advantage if air assault is your preferred combat environment.