The Soyuz 7K-L1 was designed to launch men from the Earth to circle the moon in the context of the Soviet Soyuz programme. It was based on the Soyuz 7K-OK with several components stripped out to reduce the vehicle weight. The most notable modifications included the removal of the orbital module (providing extra space for living quarters or equipment) and a reserve parachute. It was the primary hope for Soviet circumlunar flight.