Spacesuits used by the Apollo astronauts were no longer air-cooled. A nylon undergarment mesh allowed the astronaut's body to be cooled with water - similar to way a radiator cools a car's engine.
Additional layers of fabric allowed for better pressurization and additional heat protection.
Astronaut Alan B. Shepard Jr. undergoes suiting up operations at the Kennedy Space Center during the Apollo 14 prelaunch countdown. Shepard is the commander of the Apollo 14 lunar landing mission.
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