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The sign accompanying the ICG. It reads

Apollo Inflight Garment

This garment was used by Tom Stafford during the preparation for his Apollo X mission to the moon in May in 1969.

During an Apollo mission, astronauts would only wear their bulky, heavy pressurized space suits for critical maneuvers such as launch, docking, EVA, and re-entry. The rest of the time, they donned these lightweight, comfortable garments as their primary wardrobe when working inside of the spacecraft.

The Apollo inflight garments were made from an exotic material called "Beta cloth" -- a fireproof, glass-fabric material. This fabric was developed as a safety measure following the tragic fire that killed the Apollo I astronauts in 1967. Virtually all soft-sided stowage containers, the outer layer of their pressurized space suits, and any other flammable materials were either stowed or covered with Beta cloth.

The brown and white communications hat worn on the head of an Apollo astronaut was used to house microphones and headsets for communication purposes. The caps were affectionately referred to as "Snoopy" caps, derived from the comic strip Peanuts.