Strizh (Стриж meaning swift) is a space suit that was originally developed for the crew of the Soviet/Russian "Buran"-class orbiters. It resembled the Sokol space suit worn by Soyuz crew members. It was designed to protect cosmonauts during a possible ejection from the spacecraft at altitudes of up to 30 km and speeds of up to Mach 3; the "Buran"-class orbiters were designed to incorporate ejection seats similar to those found on the and "Columbia" (the latter later having the seats removed after the STS-4 mission).