| Pressure | TBD |
| Suit mass (1g) | TBD |
| Life support (primary) | Not publicly documented |
| Life support (backup) | — |
| EVA duration | N/A |
| Program | Gemini R&D |
| Agency | NASA |
| Manufacturer | David Clark Company |
| First use | 1964 |
| Status | Experimental — Gemini precursor |
| Donning / entry | Not publicly documented |
Pre-G4C Gemini suit development iteration
Early Gemini suit architecture study
Not publicly documented
"Direct development step before the operational G4C suit used on Gemini IV"
Critical link in the Gemini suit development chain
"Established B.F. Goodrich as the lead US full-pressure suit contractor before Mercury existed"
"Parallel development track alongside Model O testing different mobility solutions"
"Naval and NASA pressure suit research tracks cross-pollinated significantly in this era"
