Benefit
You gain a +4 bonus on the following:
- Athletics checks made to
- resist nonlethal damage while swimming
- continue running
- avoid nonlethal damage from a forced march
- hold your breath
- avoid nonlethal damage from starvation or thirst
- Fortitude saves made to
- avoid nonlethal damage from hot or cold environments
- resist damage from suffocation
Also, you may sleep in light or medium armor without becoming fatigued.