Harsh conditions or long exertions do not easily tire you.

Benefit: You gain a +4 bonus on the following checks and saves: Swim checks made to resist nonlethal Damage from exhaustion; Constitution checks made to continue running; Constitution checks made to avoid nonlethal Damage from a forced march; Constitution checks made to hold your breath; Constitution checks made to avoid nonlethal Damage from starvation or thirst; Fortitude saves made to avoid nonlethal Damage from hot or cold environments; and Fortitude saves made to resist Damage from Suffocation.

You may sleep in light or medium armor without becoming fatigued.

Normal: A character without this feat who sleeps in medium or heavier armor is fatigued the next day.