USSR Soviet (Russian) Red Army USSR Air Force Pilot Waterproof Lifesaving Flight Suit MSK-5
Original made in USSR in the 80's
Size #4 (Designed for pilot height 160-170 centimeters)
Size Bust (pilot): 92-104 centimeters
Pilot's waist circumference: 74-85 centimeters
The suit was in use (details are shown in the photo)

Marine rescue kit MSK-5-Individual life support equipment for aircraft crews, during flights and while afloat-after an emergency exit of the Aircraft above the water.
In combination with on-board oxygen equipment, air conditioning source and life-saving equipment, it ensures operational efficiency:
when flying in a sealed cabin (altitude up to 14 km.) at T in it from 5 to 20°C (with ventilation) for at least 12 hours.
when flying in a depressurized cabin (altitude up to 12 km.) at a temperature of -40 to 50°C (with ventilation) for at least 2 hours.
afloat with a T of water of 0°C, sea waves up to 5 points and T of air up to -15°C - at least 12 hours.
The kit is equipped with automatic KSA relief valves, which ensure its tightness in case of contact with water.