| Pressure | TBD |
| Suit mass (1g) | TBD |
| Life support (primary) | Not publicly documented |
| Life support (backup) | — |
| EVA duration | N/A |
| Program | Litton R&D |
| Agency | NASA / USAF |
| Manufacturer | Litton Industries |
| First use | 1964 |
| Status | Experimental — never flown |
| Donning / entry | Not publicly documented |
Early hard-shell rigid torso concept — distinct from soft-suit competitors
Hard-shell pressure suit research
Not publicly documented
"Litton's hard-shell approach represented a fundamentally different architecture bet than ILC's soft-suit design"
Hard-shell lineage that eventually influenced Soviet Orlan and modern hard-upper-torso EVA suits
"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"
