OSTEO combat engineering suit

The OSTEO combat engineering suit, also known as the HAZMAT armor, is an armor system employed by unaugmented personnel as well as Spartan Operations personnel for HAZMAT operations.

Design details
The HAZMAT armor platform was designed to be used by both Spartans and unaugmented personnel in all manner of dangerous conditions. The armor incorporates an array of contingency systems focused on surviving extended operations in extraordinarily harsh working and combat environments.

Usage
HAZMAT armor is for personnel who are sent on missions deep into dying Forerunner facilities, for hunters operating in and around poisoned water and air, search teams exploring sites scarred by chemical, biological, radiological, and nuclear weapons used in the Human-Covenant War, as well as even more insidious threats.

Variants
A list of variants compatible with the Hazmat armor platform.

Halo Infinite
Like Chimera before it, the Hazmat armor core was available by default during Season 04: Infection, the fourth season of Halo Infinite multiplayer. It was first revealed on May 26, 2023, in a promotional advert for a cross-promotion with Dr. Squatch soap.

Trivia

 * The OSTEO combat engineering suit is likely named after the Greek word ostéon, meaning "bone."

List of appearances

 * Halo Infinite