In an April 1968 issue...
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In an April 1968 issue of Aerospace Medicine, a NASA researcher on a space activity suit published an article. The distinctive garment proposed was to be a skintight suit enabling the Apollo astronauts to travel on the moon's surface with ease and mobility. It was distinctively lighter and less bulky than the suits worn in the earlier Mercury and Gemini programs. Because of delays, this suit was never produced for use in the Apollo program. The suit actually used was the A7L-B. It weighed 175 pounds including an eighty-pound portable life support system and a forty-pound back-up. The current suit used on the shuttle missions is the Extravehicular Mobility Unit (EMU). It weighs 275 pounds. These suits include a cooling system woven into the undergarments. This system requires twelve pounds of water in the system in order to maintain comfortable levels. This system permits up to eight hours of activity in space before all of the water is sublimated into the vacuum. Without these suits, life in the hostile environment of space is impossible.
