envirosuit

The word 'envirosuit' is a portmanteau of 'environment' and 'suit'. It is defined as a suit made to protect the wearer from hostile environmental conditions, sometimes while also providing a conferrable interior environment for the wearer. This term is most often used in science fiction, but spacesuits and hazmat suits do classify as envirosuits.

"With this envirosuit, I am protected from your evil gas of doom!"