A Necronaut Suit was a rubber suit worn by necromancers when exploring uninhabitable dimensions. It works by keeping all of the wearers life force inside the suit meaning they don't have to; eat, drink, sleep or use the bathroom. Militsa Gnosis showed a Necronaut suit to Valkyrie Cain after a discussion mentioning Lethe. Later it was revealed that Azzedine Smoke was using a suit he modified to keep Savant Vega in a constant state of corruption.
The suit is described as being black rubber with two small lenses for the wearer to see through.