The Exploration Extravehicular Mobility Unit (xEMU) was NASA’s first new spacesuit design in over forty years. Unlike the bulky suits used on the ISS, the xEMU was built for the rugged, abrasive terrain of the lunar South Pole. It featured a Portable Life Support System (PLSS) that Elias knew like the back of his hand—a backpack of high-tech machinery that managed oxygen, scrubbed CO2cap C cap O sub 2 , and kept astronauts alive in the vacuum.
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