Multiple Spell Resistances

[Dutys_Fist]

According to the PRD, "Spell resistance does not stack, but rather overlaps"
What does this mean?
Is it like DR, with "take the highest"?
Or do you roll for each instance of SR?

[Owen K. C. Stephens]

Dutys_Fist wrote:

According to the PRD, "Spell resistance does not stack, but rather overlaps"

What does this mean?
Is it like DR, with "take the highest"?
Or do you roll for each instance of SR?

I have always taken it to mean use the highest, like DR. But if for some reason one of your SR sources goes away (if it is dispelled, for example), the other source still exists.

[Stockvillain]

Highest SR is the one that counts; just check once against that one.

[Corren28]

If you have a natural spell resistance of 5 and an amulet that grants a spell resistance of 10, your spell resistance is 10. If the amulet is destroyed, lost stolen, etc. Your spell resistance drops back to 5.