Environmental suit

An environment suit is typically a one-piece garment, and many types also feature a helmet or other covering for the head.

Where the surrounding environment is especially dangerous the suit is completely sealed.

Later developments were designed to protect the wearer from the cold (for example wetsuits and other ambient pressure suits) or from undersea high pressure and the resulting decompression sickness (for example atmospheric diving suits).

In aviation, pressure suits protect fighter pilots from hypoxia / altitude sickness, and g-suits from the adverse effects of acceleration (gravity-induced loss of consciousness, or G-LOC).

The concept of an environmental suit protecting someone from contamination is a feature of the boy in the bubble trope: both David Vetter and Ted DeVita at some point used such suits.