Inertia suppression fields are special personal force field shields used by aliens in the Fallout 3 add-on Mothership Zeta. The aliens have developed advanced personal shield technology. Aliens equipped with these shields glow somewhat, and have a field of light distortion around them. It protects them during combat and makes them very difficult targets to kill. It provides a Damage Resistance of 50 at NPC level 20, 80 at NPC level 25, and 110 at NPC level 30, making the wielders very tough opponents.