Former NASA astronaut Kate Rubins told a National Academies panel that current lunar spacesuit designs aren't optimal for Artemis missions. She described upcoming Moonwalks as an "extreme physical stress," contrasting the relaxed environment of the International Space Station with the demanding lunar surface. Rubins logged 300 days in space and four spacewalks.

NASA contracted Axiom Space for $228 million to develop new commercial suits for the Artemis III mission, slated for 2028. The new designs aim for better mobility than the agency's decades-old Extravehicular Mobility Units. However, Rubins noted the Moon's partial gravity and pervasive dust amplify physical challenges, requiring suits that weigh over 300 pounds with life-support systems.

The timeline for Artemis III remains uncertain, hinging on Axiom's suit readiness and new landers from SpaceX and Blue Origin. Rubins emphasized that astronauts will face daily spacewalks, limited sleep, and constant suit use, making the lunar environment fundamentally different and more grueling than low-Earth orbit. Future suit iterations must address these compounded stresses.