Benefit: You gain a +4 bonus on the following checks/saves:
- Swim checks to resist taking NL from drowning;
- Constitution checks to continue Running;
- Constitution checks to avoid NL from a forced march, starvation, or thirst;
- Constitution checks to hold your breath;
- Fortitude saves to avoid NL from hot or cold environments;
- Fortitude saves to resist damage from suffocation.
Also, you can sleep in uncomfortable circumstances―on a kitchen chair, folded up in a car trunk, or wearing heavy armour―without become fatigued the next day.