S124-E-007975 (9 June 2008) --- Astronaut Mike Fossum, STS-124 mission specialist, sleeps in his sleeping bag, which is attached to the lockers on the middeck of the Space Shuttle Discovery, while docked with the International Space Station.

S124-E-007980 (9 June 2008) --- Astronaut Ron Garan, STS-124 mission specialist, sleeps in his sleeping bag in the Columbus laboratory of the International Space Station while Space Shuttle Discovery is docked with the station.

ISS026-E-031616 (3 March 2011) --- NASA astronaut Alvin Drew, STS-133 mission specialist, is pictured in his sleeping bag, which is attached in the Columbus laboratory of the International Space Station while space shuttle Discovery remains docked with the station.

S124-E-007977 (9 June 2008) --- Astronaut Mike Fossum, STS-124 mission specialist, is pictured in his sleeping bag, which is attached to the lockers on the middeck of the Space Shuttle Discovery, while docked with the International Space Station.

ISS026-E-031615 (3 March 2011) --- NASA astronaut Alvin Drew, STS-133 mission specialist, is pictured in his sleeping bag, which is attached in the Columbus laboratory of the International Space Station while space shuttle Discovery remains docked with the station.

Former NASA astronaut Tom Jones shows off a sleeping bag used by astronauts living aboard the International Space Station during a NASA Tweetup event at NASA Headquarters in Washington, Wednesday, Oct. 21, 2009. Photo Credit: (NASA/Carla Cioffi)

S124-E-007983 (9 June 2008) --- Japan Aerospace Exploration Agency astronaut Akihiko Hoshide, STS-124 mission specialist, is pictured in his sleeping bag in Kibo Japanese Pressurized Module of the International Space Station while Space Shuttle Discovery is docked with the station.

S132-E-007710 (17 May 2010) --- NASA astronaut Piers Sellers, STS-132 mission specialist, rests in his sleeping bag on the middeck of the space shuttle Atlantis while docked with the International Space Station.

ISS015-E-18173 (11 July 2007) --- A sleeping bag floats near two extravehicular mobility unit (EMU) spacesuits in the Quest Airlock of the International Space Station.

S134-E-006404 (16 May 2011) --- European Space Agency astronaut Roberto Vittori, STS-134 mission specialist, rests in his sleeping bag, which is attached to the lockers on the middeck of the space shuttle Endeavour. Photo credit: NASA

S121-E-06151 (8 July 2006) --- Astronaut Lisa M. Nowak, STS-121 mission specialist, sleeps in her sleeping bag, which is attached to the lockers on the middeck of the Space Shuttle Discovery while docked with the International Space Station.

This wide-angle view is of the Orbital Workshop (OWS) sleep compartment, located in the lower level of the OWS. Each crewman was assigned a small space for sleeping and zipped themselves into sleeping bags stretched against the wall. Because of the absence of gravity, sleeping comfort was achieved in any position relative to the spacecraft; body support was not necessary. Sleeping could be accommodated quite comfortably in a bag that held the body at a given place in Skylab.

ISS016-E-008034 (2 Nov. 2007) --- Astronaut Daniel Tani, Expedition 16 flight engineer, sleeps in his sleeping bag in the Unity node of the International Space Station while Space Shuttle Discovery is docked with the station.

41G-07-021 (5-13 October 1984) --- Astronauts Kathryn D. Sullivan, left, and Sally K. Ride show off what appears to be a "bag of worms", a product of their creativity. The "bag" is a sleep restraint and the majority of the "worms" are springs and clips used with the sleep restraint in its normal application. Clamps, a bungee cord and Velcro strips are other recognizable items in the "creation".

iss042e023422 (12/6/14) --- Expedition 42 Flight Engineer Samantha Cristoforetti of the European Space Agency (ESA) on 6 December 2014 is seen inside of a sleeping bag in her personal crew quarters on the International Space Station. Astronauts will strap the bag to the wall to prevent from free floating and potentially bumping into equipment while sleeping.

iss038e024951 (1/5/2014) --- Japan Aerospace Exploration Agency (JAXA) Koichi Wakata strapped into his sleeping bag in his sleep station located in the Node 2. Circadian Rhythms investigates the role of synchronized circadian rhythms, or the “biological clock,” and how it changes during long-duration spaceflight.

S120-E-007889 (1 Nov. 2007) --- Astronauts Pam Melroy (left), STS-120 commander; George Zamka (bottom right), pilot; and European Space Agency's (ESA) Paolo Nespoli, mission specialist, sleep in their sleeping bags, which are secured on the middeck of the Space Shuttle Discovery while docked with the International Space Station.

STS072-306-024 (11-20 Jan. 1996) --- Astronaut Daniel T. Barry sleeps on the middeck of the Earth-orbiting Space Shuttle Endeavour. The sleeping bag is considered advantageous primarily because it restricts movement in the microgravity environment, as Barry’s crew mates pointed out during a televised NASA briefing following the mission.

S125-E-012366 (20 May 2009) --- Astronaut Gregory C. Johnson, STS-125 pilot, rests in his sleeping bag on the flight deck of the Earth-orbiting Space Shuttle Atlantis at the end of flight day 10.

iss067e379057 (Sept. 23, 2022) --- NASA astronaut and Expedition 67 Flight Engineer Kjell Lindgren poses for a portrait inside a crew sleeping bag aboard the International Space Station.

ISS016-E-013098 (29 Nov. 2007) --- With most of his body tucked away in a sleeping bag, astronaut Daniel Tani, Expedition 16 flight engineer, poses for a photo near two extravehicular mobility unit (EMU) spacesuits in the Quest Airlock of the International Space Station.

ISS024-E-006664 (25 June 2010) --- With most of his body tucked away in a sleeping bag, Russian cosmonaut Fyodor Yurchikhin, Expedition 24 flight engineer, is pictured in his crew quarters compartment in the Zvezda Service Module of the International Space Station.

ISS019-E-014672 (7 May 2009) --- Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata, Expedition 19/20 flight engineer, is photographed in a sleeping bag attached to the racks in the Kibo laboratory of the International Space Station.

S125-E-011488 (18 May 2009) --- Astronaut Megan McArthur, STS-125 mission specialist, rests in her sleeping bag, which is attached to the lockers on the middeck of the Earth-orbiting Space Shuttle Atlantis at the end of flight day eight.

S118-E-06828 (11 Aug. 2007) --- Astronaut Alvin Drew, STS-118 mission specialist, works near a hatch of Space Shuttle Endeavour while docked with the International Space Station during flight day four activities. Sleeping bags are visible in the foreground.

ISS015-E-18168 (11 July 2007) --- With most of his body tucked away in a sleeping bag, astronaut Clay Anderson, Expedition 15 flight engineer, poses for a photo near two extravehicular mobility unit (EMU) spacesuits in the Quest Airlock of the International Space Station.

S125-E-011491 (18 May 2009) --- Astronauts Mike Massimino (left), Michael Good and Megan McArthur (mostly out of frame at right), all STS-125 mission specialists, are pictured in their sleeping bags, which are attached to the lockers on the middeck of the Earth-orbiting Space Shuttle Atlantis at the end of flight day eight.

Radiation insulation technology from Apollo and subsequent spacecraft was used to develop superinsulators, used by makers of cold weather apparel, to make parkas, jackets, boots and outdoor gear such as sleeping bags. The radiant barrier technology offers warmth retention at minimal weight and bulk.

S125-E-011487 (18 May 2009) --- Astronaut Megan McArthur, STS-125 mission specialist, rests in her sleeping bag, which is attached to the lockers on the middeck of the Earth-orbiting Space Shuttle Atlantis at the end of flight day eight.

Radiation insulation technology from Apollo and subsequent spacecraft was used to develop superinsulators, used by makers of cold weather apparel, to make parkas, jackets, boots and outdoor gear such as sleeping bags. The radiant barrier technology offers warmth retention at minimal weight and bulk.

ISS016-E-008792 (2 Nov. 2007) --- European Space Agency (ESA) astronaut Paolo Nespoli, STS-120 mission specialist, rests in his sleeping bag in the Harmony node of the International Space Station while Space Shuttle Discovery is docked with the station.

STS090-377-011 (17 APRIL-3 MAY 1998) --- Astronaut Dafydd R. (Dave) Williams, mission specialist representing the Canadian Space Agency (CSA), accomplishes more than one purpose when he sleeps in this bunk aboard the Earth-orbiting Space Shuttle Columbia. Conducting a Neurolab sleep experiment, Williams wears equipment which includes a sleep net (mesh cap that monitors and records brain waves); a Respiratory Inductance Plethysmograph (RIP) suit for monitoring respiration; and an activity monitor -- a device (out of view) worn on the wrist to detect and record body movement. Data on brain waves, eye movements, respiration, heart rate, and oxygen concentration are routed to a portable data recorder. The entire system has capabilities similar to a fully equipped sleep laboratory on Earth. The sleeping bag is conventional Shuttle ware and not part of the experiment.

ISS013-E-67441 (17 Aug. 2006) --- Astronaut Jeffrey N. Williams, Expedition 13 NASA space station science officer and flight engineer, holds a sleeping bag while conducting an educational teleconference with the Boys and Girls Clubs of Middle Tennessee in Nashville, via Ku- and S-band in the Destiny laboratory of the International Space Station, with audio and video relayed to the Mission Control Center at Johnson Space Center.