Rad Resistance

Rad Resistance is a Fallout, Fallout 2, Fallout 3, Fallout: New Vegas and Fallout Tactics perk.

Fallout, Fallout 2 and Fallout Tactics
Each level of this perk will one's Radiation Resistance by 15%.

Fallout 3 and Fallout: New Vegas
With this perk, one's radiation resistance improves by 25%.