Polar is a research refrigerator designed and developed by University of Alabama at Birmingham (UAB) Center for Biophysical Sciences and Engineering (CBSE) for NASA Cold Stowage. Polar was designed as a single mid-deck locker equivalent payload to store scientific samples on-board ISS and in transport to/from ISS via SpaceX Dragon or Cygnus spacecraft. Polar operates between 4 and −95 °C.