Gemini space suit helmet stowage bag. Approx. 12 in. diameter, semi-circular with a flat base. Designation GSB-4C for Gemini Stowage Bag, version 4 of the Clark series, with P/N A-1806 and SER. NO. 103. NOV 1965. The bag is constructed of High Temperature (HT-1) nylon with the blue access flap constructed of nylon and velcro attachments. It provided a protective cover for the Gemini G4C helmet while not in use by the astronaut.