An Omnishield Helm is a standard component of the wargear used by the Tempestus Scions of the Militarum Tempestus. In hostile environments, the Storm Troopers of a Tempestus Scions regiment will don all-enclosing Omnishield Helms, their Respmask Arrays proof against everything from industrial pollution to fully ignited atmospheres. When sealed, they allow Tempestus Scions to operate even in airless vacuums for limited periods of time. The multi-spectral occulum that attaches via suction to the wearer's eye sockets allow him to see in low light and occluded conditions with relative ease.
- Codex: Militarum Tempestus (6th Edition), pg. 8