Hazard Trooper

Hazard troopers were a specialized subsection of Imperial stormtroopers.
Hazard troopers wore a very heavy suit of body armor which offered complete immunity to temperature extremes, as well as being immune to acidic damage. The armor was also a functioning space suit which could keep the wearer alive in a vacuum or underwater environment for up to three days.
Hazard troopers were commonly equipped with either the heavy repeating blaster or the Stouker concussion rifle.