Light, warm and built with an articulated fit, the Primo Down Jacket features 2-layer GORE-TEX ® fabric for durably waterproof/breathable and windproof protection. 100% Traceable Down (800-fill-power goose down that can be traced back to birds that were never force-fed, never live-plucked) keeps you warm in the harshest elements, from frigid dawn patrol missions to stormy laps in the trees.