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Extravehicular activity (EVA), or spacewalking, provides astronauts the capability to explore outside of the confines of their spacecraft or habitat. EVA spacesuits must provide pressurization, life support (oxygen to breathe, CO2 removal), thermal, radiation, and debris protection for the astronauts while also enabling exploration through mobile and light weight suits. EVA is a highly complex, potentially hazardous, yet critically important component of human space exploration. Failures during EVA can potentially result in loss of mission, or even loss of life; however, successful EVA enables scientific breakthroughs, advanced technology demonstrations, and iconic human achievements.


Spacewalking Spacesuits Life support systems Astronaut exploration 


  1. Annis J, Webb P (1971) Development of a space activity suit. Tech. repGoogle Scholar
  2. Buckey JC (2006) Space physiology. Oxford University Press, New YorkGoogle Scholar
  3. Conkin J, Norcross J, Wessel J, Abercromby A, Klein J, Dervay J, Gernhardt M (2015) Evidence report: risk of decompression sickness (dcs). Tech. rep., NASA Human Research ProgramGoogle Scholar
  4. Larson WJ, Pranke LK (2000) Human spaceflight: mission analysis and design. McGraw-Hill, New YorkGoogle Scholar
  5. NASA (1998) The space shuttle extravehicular mobility unit (emu). Tech. rep., NASA: Suited for SpacewalkingGoogle Scholar
  6. NASA (2013) International space station (iss) eva suit water intrusion – high visibility close call. https://​www.​nasa.​gov/​sites/​default/​files/​files/​Suit_​Water_​Intrusion_​Mishap_​Investigation_​Report.​pdf
  7. NASA (2015b) Mark iii imageGoogle Scholar
  8. Newman DJ, Bethke K, Carr C, Hoffman J, Trotti G (2004) Astronaut bio-suit system to enable planetary exploration. In: 55th International astronautical congressGoogle Scholar
  9. Opperman RA, Waldie J, Natapoff A, Newman DJ, Jones JA (2010) Probability of spacesuit-induced fingernail trauma is associated with hand circumference. Aviat Space Environ Med 81(10):907–913CrossRefGoogle Scholar

Authors and Affiliations

  1. 1.Wearable Technology Laboratory (WTL), Department of Design, Housing and ApparelUniversity of MinnesotaSt. PaulUSA
  2. 2.Human Systems Laboratory (HSL), Department of Aeronautics and AstronauticsMassachusetts Institute of Technology (MIT)CambridgeUSA

Section editors and affiliations

  • Leticia Vega
    • 1
  1. 1.NASA Johnson Space CenterHouston, TXUnited States

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