Moscow TV carried the cosmonauts' EVA preparations live. Khrunov and Yeliseyev put on their Yastreb ("hawk") suits in the Soyuz 5 orbital module with aid from commander Boris Volynov. Yastreb suit design commenced in 1965, shortly after Alexei Leonov's difficult EVA. Leonov served as a consultant for the design process, which was completed during 1966. Suit fabrication and testing occurred in 1967, but the Soyuz 1 accident in April of that year and Soyuz docking difficulties on the Soyuz 2 and Soyuz 3 missions delayed their use in space until the Soyuz 4 and Soyuz 5 flights. To prevent the suit from ballooning, the Yastreb suit used a pulley-and-cable articulation system. Wide metal rings around the gray nylon canvas undersuit's upper arms served as anchors for the upper body articulation system. The Yastreb had a regenerative life support system in a rectangular white metal box placed on the chest and abdomen to facilitate movement through the Soyuz's hatchways.