Yes, it’s true — astronauts share ‘underwear’ when they put on spacesuits to work outside of the International Space Station. This isn’t quite the same type of underwear you’re thinking of, as the astronauts first put on a disposable diaper, then the full-body underwear layer. Still, there are some downsides to this arrangement that the ESA is attempting to address with a new project. The International Space Station — and future space stations that will eventually replace it — are home to a number of spacesuits used during spacewalks. These suits are highly complex and composed of multiple layers designed to protect the person wearing them, including maintaining their comfort. Rather than assigning each astronaut their own suit, the teams share suits.