They were wearing new spacesuits — the first time the company's suits were tested by humans in space.

The astronauts wore the spacesuits for the entire 19-hour-long flight to the International Space Station (ISS), where they'll stay for the next one to four months.

The suits have touchscreen-compatible gloves that enable the astronauts to pilot the Crew Dragon, whose control panel is touchscreen-only.

Most recently, the NASA astronauts who have gone to the space station wore Russian Sokol suits, since the US had been buying seats on Russian Soyuz spacecraft since 2011.

"I personally spent a lot of time — it took us three, almost four years to design these suits that both look good and work well," he said

"You see the spacesuits in the movies — they look good, they don't work well," he said

But Musk said he wanted to design a spacesuit to inspire kids to become astronauts and don the uniform themselves — to "get them fired up," he said