For days when the weather app only shows a single digit, we zip up the icebreaker 1360 MerinoLoft Jacket for an added layer of warmth and comfort during our winter hike or a day on the mountain. The cotton shell is wind and water-resistant to protect us from the elements, while the MerinoLoft and Ecoloft insulation features a high warmth-to-weight ratio to keep us from shivering. Other features include an attached hood, secured Alpine pockets, and a back hanger loop for easy storage.