Your psionic power reinforces your physical form.

Prerequisite: Psionic Body, soulknife level 3

Benefit: As long as you maintain psionic focus, you gain a +1 bonus to your Fortitude saves for each psionic feat you have (including this one), to a maximum bonus of 1/3 of your soulknife class level (rounded down, minimum +1).
You can expend your psionic focus as an immediate action to also add your Wisdom bonus to your Fortitude saves instead of your Constitution bonus until the beginning of your next turn.