What does a pressure suit protect against?

A pressure suit is specifically designed to protect the wearer from the effects of reduced atmospheric pressure experienced at high altitudes. When aircraft operate at great heights, the air pressure decreases significantly, which can lead to various physiological problems, including hypoxia (lack of oxygen) and the formation of gas bubbles in body fluids, a condition known as decompression sickness. The suit maintains a stable internal pressure and provides sufficient oxygen, allowing the wearer to function safely in environments where standard atmospheric conditions cannot be maintained.

While other protective gear may help against hypothermia, fire, or high speeds, these are not the primary functions of a pressure suit. It is essential for ensuring the safety and operational capability of aircrew members when exposed to the extreme conditions associated with high-altitude flight.