Noun
enviro-suit (uncountable)
(science fiction) a garment covering the whole body which allows the wearer to maintain a separate atmosphere from the surroundings
The Quad Damage power up from Quake is still present in Quake II and new power-ups include the Ammo Pack, Invulnerability, Bandolier, Enviro-Suit, Rebreather, and Silencer. Source: Internet