From Halopedia, the Halo wiki
The Tracker helmet has an anti-flare vision shroud that covers nodes as well as a tricloptic node cluster that improves target tracking. The suit has a strain resistant reactor case to mitigate gravity-induced trauma. It also features an energy stack funnel that dynamically adjusts shield resilience.
The suite includes satellite link feeds, persistent silhouette-locking agents, and cloud-induction tracers.
The Tracker variant is manufactured by Acheron Security and tested at Acheron Trauma Sim. It is intended primarily for long-range tracking of targets, including the following of targets off-world and between continents.
ONI field operatives make use of several optional peripherals that augment the TRACKER suit's analytical capabilities. ONI asset recovery specialists make extensive use of the TRACKER armor's biological and information forensics functionality to locate their assigned targets - whether man or machine.
Available skins: Adroit (ADRT)
Halo 5: Guardians
Unlock: Rare REQ card
In Halo 5: Guardians due to the "Body" having a predefined customisation this armor set permanently has the following parts from Halo 4:
Halo 4 skins
Halo 5: Guardians skins
List of appearances