pf2e.fyi
From Pathfinder Lost Omens Pathfinder Society Guide, which isn't enabled.

Rugged Survivalist

FEAT 12
Archetype Swordmaster
Prerequisites Swordmaster Dedication; master in Survival

You've studied survival skills with the School of Swords experts and are comfortable spending long periods of time in the wilderness. You don't get fatigued more quickly due to precipitation during overland travel, though you can otherwise be fatigued as normal. You can go 3 days + your Constitution modifier without water before you take damage from thirst and you can go 5 days + your Constitution modifier without food before you take damage from starvation.

Pathfinder Lost Omens Pathfinder Society GuideOGL