Welcome to Halo Answers. What would you like to know?

They're tubes which soldiers are stored in, and then frozen, which will shut their bodies down for a certain amount of time until they are needed. It can also function as a way to prolong a dying soldier's life, since when they're frozen, pretty much everything going on in the body stops until unfrozen. This allows the dying servicemember to be transported to adequate medical facilities, to hopefully save their life.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.