Semi Powered Infiltration Armor: Difference between revisions

[[Image:SpartanIII.jpg|thumb|200px|Mark II SPI Armor]]'''Semi-Powered Infiltration Armor''', colloquially called "'''SPI Armor'''", was an [[armor]] system used by the [[United Nations Space Command]]. Though more advanced than the [[ODST]] [[Body Suit]]s, it was far less advanced and less powerful than the [[MJOLNIR Armor]] used by the [[Spartan-II]]s. Its main benefit was that it was drastically cheaper to produce than the MJOLNIR armor. It features [[Camouflage Cloak|special photo-reactive panels]] that mimic the surrounding textures, effectively the UNSC equivalent to the [[Covenant]] [[Active Camouflage]] systems. It has been described as part legionnaire mail, part tactical body armor, and part chameleon.<ref>[[Halo: Ghosts of Onyx]] page 16</ref>

SPI Mark I was used by the Spartan-IIIs of [[Alpha Company|Alpha]] and [[Beta Company|Beta Companies]] from [[2531]] to [[2545]]. [[Gamma Company]] also used the armor for a short time. It featured hardened plates and photo-reactive panels. Though advanced compared to standard UNSC infantry armor, it could only take a few glancing blows before failing. It featured full body armor with a helmet and [[HUD]], and a supply of breathable atmosphere, though only for a few minutes compared to the MJOLNIR armor endurance of several hours. It is also equipped with a cushioning layer of liquid nanocrystals that provided more ballistic protection than three centimeters of [[wikipedia:Kevlar|Kevlar]] diamond weave without the bulk.

SPI Mark II was a more advanced version of the armor, with numerous upgrades. They had new photo-reactive coating to boost camouflaging properties. There were also numerous experimental refits to gel ballistic layers, upgraded software suites, and other functions. It was proposed in [[2537]], but the request was denied because the armor was over budget. It is weakest at the knees.

SPI Mark II was used by the Drill Instructors for Beta Company, and was first used by SPARTAN-III's in Gamma Company.

The armor permutation in Halo 3 that you can choose for your SPARTAN is not SPI, but [[EVA Armor| EVA (Extra Vehicular Activity) Armor]]. The name and changes in appearance are purely cosmetic, however, having no impact on gameplay. This has been confirmed by Bungie.