Astronauts report having trouble sleeping in microgravity due to the absence of proprioceptive feedback. This includes signals from the body’s posture that indicate sleep. Currently on the ISS, they make their own restraint systems using bungee cords and Velcro to simulate this pressure and promote sleep.

Drift is a pneumatic, inflatable system integrated into the sleeping bags similar to those used on-board space stations which provides adjustable pressure to the astronauts body. This intuitive system helps replicate the comforting sensation of collapsing into a bed at the end of the day, something that many astronauts missed when in a microgravity environment.