| Pressure | 4.3 psi / 29.6 kPa |
| Suit mass (1g) | 254 lb (system) |
| Life support (primary) | PLSS nominal 8 hr |
| Life support (backup) | Secondary oxygen package 30 min |
| EVA duration | 8 hours |
| Program | Shuttle |
| Agency | NASA |
| Manufacturer | Hamilton Standard + ILC |
| First use | 1983 |
| Status | Retired / evolved |
| Donning / entry | Rear-entry modular HUT/LTA architecture |
Hard torso, bearings, replaceable modules, MMU/SAFER compatibility
Orbital assembly, repair, servicing — Shuttle era
Massive at 1g; glove/cold-object issues; maintenance burden
"Dedicated EVA architecture dramatically improved work efficiency vs IEVA"
Core template for ISS and exploration EVA systems — direct ancestor of AxEMU
"Even a simple IVA suit needs water survival and cockpit visibility contingencies"
"Suit performance cannot be separated from translation aids and workload planning"
"Lunar EVA required not just survival but sustained human work capability"
