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One of the subpanels of the sign which accompany the Starliner pressure vessel. It reads

Boeing CST-100

Starliner approaching the International Space Station May 2022 during Orbital Flight Test-2

Spacesuit

Veteran Astronaut Chris Ferguson, Boeing director of crew and mission operations, testing the spacesuit for Starliner

While both Boeing and SpaceX were selected to provide commercial crew transportation to the ISS, NASA allowed each company to choose how to fulfill program requirements, leading both companies to develop their own, incompatible suits. During the Boeing crew flight test, it became necessary to leave the crew on the ISS due to concerns with the safety of the Starliner on which the astronauts arrived and instead return them on a Dragon spacecraft. Since the suits weren't compatible, it was necessary to send up SpaceX suits for the stranded Starliner crew members.