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Aldrin's biological isolation garment (BIGs) from Apollo 11.

The sign accompanying it reads

Biological Isolation Garment, Apollo 11

The Biological Isolation Garment was designed to prevent the spread of any unearthly organisms the astronauts might have acquired while on the Moon. The suits were donned after splashdown and worn until the astronauts arrived at the Mobile Quarantine Facility aboard the recovery aircraft carrier.

The Moon proved to be barren of life and such precautions were dropped after the Apollo 12 mission.

This garment was worn by Edwin E. Aldrin Jr.

This item is Smithsonian collections ID #A19710809000.