Space Suit

A space suit is a complex system of garments and equipment and environmental systems designed to keep a person alive and at ease in the harsh environment of outer space. This applies to extra-vehicular action outside spacecraft orbiting Earth and has applied to walking, and riding the Lunar Rover, on the Moon.

Some of these requirements also apply to force suits worn by people such as high-altitude fighter pilots who may fly so high that breathing pure oxygen at adjacent pressure would not provide enough oxygen for them to function: see hypoxia.