Pressure suit
Type of protective suit worn in low pressure environments / From Wikipedia, the free encyclopedia
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For diving suits that protect against excessively high pressure, see Atmospheric diving suit. For the positive pressure suit used in biocontainment, see Positive pressure personnel suit.
A pressure suit is a protective suit worn by high-altitude pilots who may fly at altitudes where the air pressure is too low for an unprotected person to survive, even when breathing pure oxygen at positive pressure. Such suits may be either full-pressure (e.g., a space suit) or partial-pressure (as used by aircrew). Partial-pressure suits work by providing mechanical counter-pressure to assist breathing at altitude.