This protective helmet was possibly worn by Frank Borman during the launch of the Gemini 7 mission in December, 1965. The helmet was fitted with communications equipment, and was worn under the hood-like, integrated helmet of the G5-C spacesuit.
The helmet portion of the suit was attached with a zipper closure, and could be unzipped and pushed away, though it was non-removable during flight. It consisted of a fixed polycarbonate visor which provided a "fish bowl" effect for the astronaut - namely he could move his head within the helmet rather than moving head and helmet at the same time.
Transferred from NASA in 1967.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.