Cocoons are pods that the Wraith use to preserve humans for future feedings. Releasing a sticky, web-like substance (one they appear to be able to produce naturally) they are capable of preserving a human in stasis almost indefinitely. The victims are virtually immobile, but some limited movement is possible. Though horrified at being held in one, Rodney McKay actually found cocoons to be quite comfortable, taking all pressure off the spine and warming the victims within the rather cold Hive ship. (SGA: "Underground", "The Defiant One", "The Hive", "No Man's Land")
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