HEV Suit

The Hazardous Environment suit, usually abbreviated to just the HEV Suit or hazard suit, is a full-body suit of armor developed by Black Mesa and prominently worn by theoretical physicist Gordon Freeman, the main protagonist of the Half-Life games.

Features
While the suit protects the wearer from blunt force and electrical charges, it is most specially defensive against acid, radiation, or other harmful chemicals. It also has a built in computer that vocally displays the wearer's current medical status via a soothing female voice. It will also scan and report the environment, giving the wearer a heads up on areas with dangerously high temperatures or large doses of radiation.