Editing Space suit (section)

=== Secondary requirements ===
[[File:First Six Women Astronauts with Rescue Ball - GPN-2002-000207.jpg|thumb|From left to right, Margaret R. (Rhea) Seddon, Kathryn D. Sullivan, Judith A. Resnick, Sally K. Ride, Anna L. Fisher, and Shannon W. Lucid{{mdash}}The first six female astronauts of the United States stand with a [[Personal Rescue Enclosure]], a spherical life support ball for emergency transfer of people in space]]
Advanced suits better regulate the [[astronaut]]'s temperature with a [[Liquid Cooling and Ventilation Garment]] (LCVG) in contact with the astronaut's skin, from which the heat is dumped into space through an external radiator in the PLSS.

Additional requirements for EVA include:
* Shielding against [[ultraviolet]] radiation
* Limited shielding against [[particle radiation]]
* Means to maneuver, dock, release, and tether onto a spacecraft
* Protection against small [[micrometeoroid]]s, some traveling at up to 27,000 kilometers per hour, provided by a puncture-resistant [[Thermal Micrometeoroid Garment]], which is the outermost layer of the suit. Experience has shown the greatest chance of exposure occurs near the [[gravitational field]] of a moon or planet, so these were first employed on the [[Apollo program|Apollo]] lunar EVA suits (see ''[[#United States suit models|United States suit models]]'' below).

[[File:Thermal Micrometeoroid Garment.gif|thumb|Layers of a space suit.]]

As part of [[astronautical hygiene]] control (i.e., protecting astronauts from extremes of temperature, radiation, etc.), a space suit is essential for extravehicular activity. The [[Apollo/Skylab A7L]] suit included eleven layers in all: an inner liner, a LCVG, a pressure bladder, a restraint layer, another liner, and a Thermal Micrometeoroid Garment consisting of five aluminized insulation layers and an external layer of white Ortho-Fabric. This space suit is capable of protecting the astronaut from temperatures ranging from {{convert|-156|°C}} to {{convert|121|°C}}.{{Citation needed|date=December 2010}}

During exploration of the Moon or Mars, there will be the potential for lunar or Martian dust to be retained on the space suit. When the space suit is removed on return to the spacecraft, there will be the potential for the dust to contaminate surfaces and increase the risks of inhalation and skin exposure. Astronautical hygienists are testing materials with reduced dust retention times and the potential to control the dust exposure risks during planetary exploration. Novel ingress and egress approaches, such as [[suitport]]s, are being explored as well.

In [[NASA]] space suits, communications are provided via a cap worn over the head, which includes earphones and a microphone. Due to the coloration of the version used for Apollo and [[Skylab]], which resembled the coloration of the comic strip character [[Snoopy]], these caps became known as "[[Snoopy cap]]s".