| Pressure | 3.7 psi / 25.5 kPa |
| Suit mass (1g) | 22 lb |
| Life support (primary) | Vehicle provided |
| Life support (backup) | Vehicle provided |
| EVA duration | N/A |
| Program | Mercury |
| Agency | NASA |
| Manufacturer | B.F. Goodrich |
| First use | 1961 |
| Status | Retired |
| Donning / entry | Front entry, custom fitted |
Tight low-volume suit, moving-with-head helmet restraint
Launch / entry contingency pressure retention
No neck bearing; limited head rotation when pressurized; flotation deficiency exposed after hatch jettison incident
"Even a simple IVA suit needs water survival and cockpit visibility contingencies"
Relevant to ultra-light commercial IVA design and crew rescue packaging
Suit lacked adequate flotation during premature hatch jettison water egress
→ Abort-survival packaging must be tested against actual post-egress scenarios, not assumed from lab conditions
"Suit performance cannot be separated from translation aids and workload planning"
"Lunar EVA required not just survival but sustained human work capability"
"Endurance and traversal demands exposed the need for mobility, dust robustness, and rover integration"
