DESC: The challenge with using the Marmot Women's Ouray Sleeping Bag on multi-day, mid-winter mountaineering trips is not staying warm at night. The problem arises in the mornings, when it's time to leave the Ouray's cozy confines for the single-digit cold awaiting you. This excursion-strength bag is stuffed with 600-fill down that is strategically placed to provide more warmth where you need it most, thus boosting its comfort rating without adding a ton of weight.