It's been 35 years since cosmonaut Svetlana Savitskaya became the first woman to walk in space when she stepped outside the Salyut 7 space station. We're now going to have to wait longer for the first all-female spacewalk team.
"McClain learned during her first spacewalk that a medium-size hard upper torso -- essentially the shirt of the spacesuit -- fits her best," NASA said. "Because only one medium-size torso can be made ready by Friday, March 29, Koch will wear it."
NASA tweeted a clarification about the spacesuits on Tuesday, noting that there's more than one medium torso on the ISS, but that to stay on schedule "it's safer and faster to change spacewalker assignments than reconfigure spacesuits."
There is no difference between a male or female's suit, except that female astronauts usually require a smaller size, according to NASA.
McClain posted a video to Twitter on March 21 explaining what goes into preparing a spacesuit for a spacewalk, a maintenance and cleaning process that starts about a month ahead of the actual event.
This spacewalk would have been a quick turnaround for McClain, who took part in her first spacewalk this past Friday along with Hague. McClain and Hague worked on swapping out batteries and installing adapter plates.
The battery upgrades are scheduled to take place over a couple of years as new hardware arrives at the ISS.
Originally posted March 25, 9:35 a.m. PT. Update, 3 p.m. : Adds details from NASA's change-of-assignment announcement. Update, March 26: Adds information about spacesuit sizing and maintenance and NASA clarification on spacesuit availability on the ISS.