The Sokol space suit is a series of soft-body pressure suits designed and built by NPP Zvezda. It was first introduced in 1973 for the Soviet space program following the Soyuz 11 disaster, and continues to see use in the modern day primarily by the Russian space program, being worn by space travelers flying aboard the Soyuz spacecraft. A version of Sokol is also used by the China Manned Space Program.

Soyuz 11 was the only crewed mission to board the world's first space station, Salyut 1. The crew, Georgy Dobrovolsky, Vladislav Volkov, and Viktor Patsayev, arrived at the space station on 7 June 1971, and departed on 29 June 1971. The mission ended in disaster when the crew capsule depressurised during preparations for re-entry, killing the three-person crew. The three crew members of Soyuz 11 are the only humans to have died in space.