The caldera down provides extra warmth where it's needed with responsibility-sourced 800 fill power goose down with allied feather and down, and synthetic insulation on the chest and sides to give a great range of motion and fit. Equally at home on the trail as on the street; featuring a Stretch fabric, removable hood, and a full set of ski features on the interior that will make your day on the mountain comfortable, and the coldest of temps an afterthought.