| Pressure | 400 hPa |
| Suit mass (1g) | TBD |
| Life support (primary) | Vehicle-supported open-loop |
| Life support (backup) | Emergency oxygen |
| EVA duration | N/A |
| Program | Soyuz |
| Agency | Roscosmos |
| Manufacturer | Zvezda |
| First use | 1980 |
| Status | Active |
| Donning / entry | Soft rescue suit with refined lower torso and closure logic; sea survival collar |
Long-lived Soyuz rescue standard; manufacturing continued into ISS era
Soyuz-T / TM / TMA / MS ISS ferry rescue standard
Difficult donning; poor downward visibility; under-knee discomfort; decades of upgrade latency
"Keep rescue-suit platforms on a managed block-upgrade path instead of deferring subsystem refresh for decades"
Still flying today on Soyuz. Long-service record reveals both resilience and the cost of deferred modernisation
Difficult donning, restricted downward vision, under-knee discomfort, appendix tie-off burden across decades of operations
→ IVA rescue suits fail operationally when crew usability is treated as secondary. Track don/doff time and visibility as design KPIs
"Shows value of integrated survival architecture and the penalty of long-duration IVA wear in a rigidly seated posture"
"Pressurized mobility and re-entry-to-airlock recovery must be a top-level requirement, not an afterthought"
"Rear-entry and semi-rigid architecture remain highly relevant for surface systems and suitport concepts"
