Editing Fremen (section)

===Water conservation===
Herbert illustrates that living in the desert with no natural sources of water has spurred the Fremen to ritualize and build their society around the collection, storage, and conservative use of all moisture. They conserve the water distilled from their dead, consider spitting a sign of respect, and put a great cultural reverence on tears. Water is collected from the atmosphere in [[windtrap]]s that condense the humidity and add it to underground water stores in each sietch. Water can also be collected from dead people and animals using a [[deathstill]] to remove the water from a corpse for addition to the sietch water store. Personal ownership of moisture is designated by "water rings", which are used as a form of currency. When outside of their sietch, Fremen wear a [[stillsuit]], a special body-enclosing suit designed to collect and recycle all the moisture the body releases through perspiration, urine, feces, and even the exhalation of [[water vapor]] in the breath. The special fabric is a micro-sandwich designed to dissipate heat and filter wastes while reclaiming moisture. The water is then held in catchpockets and made available to drink through a tube. A Fremen in a well-kept suit can survive weeks in the desert without any other source of water.<ref>{{Cite web|url=https://gamerant.com/dune-stillsuit-explained/|title=''Dune'': The Stillsuit, Explained|first=Joshua Kristian|last=McCoy|date=June 15, 2023|website=[[Game Rant]]|access-date=March 6, 2024}}</ref> Herbert even suggests in ''Dune'' that the Fremen have adapted to the environment physiologically, with their blood able to clot almost instantly in order to prevent water loss.<ref>{{cite book|last=Herbert|first=Frank|title=Dune|url=https://archive.org/details/dune0000herb|url-access=registration|year=1965|quote=[Jessica] tipped up the point, drew a delicate scratch with the blade's edge above Mapes' left breast. There was a thick welling of blood that stopped almost immediately. ''Ultrafast coagulation'', Jessica thought. ''A moisture-conserving mutation?''}}</ref>