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From Pathfinder Howl of the Wild, which isn't enabled.

Environmental Adaptability

FEAT 8
Archetype Wild Mimic
Prerequisites Wild Mimic Dedication

Having experienced the harshest environs that nature has to offer, your body is able to adapt to intense heat and cold. During your daily preparations, you can choose to become protected from the effects of severe cold or severe heat until the next time you make your daily preparations. Starting at 12th level, this activity also protects you from the effects of extreme cold or extreme heat.

Pathfinder Howl of the WildORC