First, it has a port that connects to a spacecraft for extravehicular activity and more air when used in low to zero atmosphere. Next are the materials used for the heavily engineered inner suit, which is built from a layer of urethane-coated nylon and polyester layer. And since the Z-1 prototype is built for versatility, it is outfitted with bearings on the hips, waist, upper legs, and ankles for mobility. “It’s like you’re trying to go on vacation, but you don’t know if you’re going to Antarctica, Miami, or Buckingham Palace,” Johnson Space Center spacesuit engineer, Amy Ross said. “We’re building a lot of tools for the toolbox. Right now we’re asked to be very flexible.”