This pressure helmet was made for and worn by astronaut Alfred Worden, Command Module Pilot of the Apollo 15 mission in July, 1971.
The Apollo pressure helmet was a transparent bubble designed to attach to the spacesuit neck ring. It was constructed of a polycarbonate shell with a red anodized aluminum neck ring, a feed port, a vent pad and duct assembly attached to the rear and a valsalva device attached to the inner ring.
Transferred to the national Air and Space Museum from NASA in 1973.