Onyx - SPI Armor

Although Tom wore a full suit of Semi-Powered Infiltration armor (colloquially called "SPI" armor by Section Three techno-philes), its hardened plates and photo-reactive panels could only take a few glancing shots before failing. The armor's camouflag-ing textures sputtered and stabilized, however; and once again blended into the rocky terrain.


- Halo: Ghosts of Onyx, Prologue