NASA’s next generation of lunar spacesuits is supposed to symbolize a confident return to the Moon, but one of the people who has actually lived in a suit for months at a time is not impressed. Former astronaut Kate Rubins has warned that although the new designs improve on Apollo,

NASA still plans to conduct plenty of tests involving the suit, including parabolic flight, which can simulate the partial gravity of the Moon’s surface. The agency has already put the suit through its paces underwater at NASA’s Neutral Buoyancy Lab.

Time to suit up!