The first next-generation spacesuit Orlan-MKS for work in outer space will be delivered to the International Space Station (ISS) in December, CEO and Chief Designer of the Zvezda Research and Production Enterprise Sergei Pozdnyakov told TASS on Tuesday.

"Now all the difficulties have been overcome and two spacesuits are fully ready for their delivery to the ISS. One of them is to be delivered by a Progress MS-04 space freighter in December and another by a Progress MS-05 spacecraft in 2017. This will be followed by the delivery of the third backup spacesuit," the chief designer said.

It was initially planned that the spacesuits would be delivered to the world’s sole orbiter back at the end of 2014.

"The delay with the delivery was caused by the insertion of two considerable innovations into the new-generation spacesuits - the automatic thermal regulation system, i.e. actually climate control so that cosmonauts do not get distracted from their work in outer space for regulating temperature manually, and also the replacement of the rubber air tight wrapping with a principally new layer made of polyurethane, Pozdnyakov explained.New air tight wrappings are very durable and wear-proof and "they can be called actually eternal," the chief designer said.