Cold Endurance
(Secrets of Sarlona, page 115, DnD 3.5)
[General]
Either because of growing up in a cold environment or training your body and mind to ignore the biting effect of cold, you can exist with ease in low-temperature environments.
Prerequisite
Base Fortitude save +2
Benefit
You can exist comfortably in temperature conditions of 0 F and higher without having to make Fortitude saves (MM 302). You also gain a +2 bonus on saving throws against cold effects. Cold Endurance doesn't provide any level of resistance to cold damage.