A creature exposed to weightlessness must make a Fortitude save (DC 15) to avoid the effects of space sickness.

Those who fail the save are shaken, and those who fail the save by 5 or more are also nauseated. The effects persist for 8 hours. A new save is required every 8 hours the creature remains in a zero-g environment.

Creatures with the Zero-G Training feat do not suffer the effects of space sickness.