This versatile winter active piece can cover all your heart-racing cold weather adventures layered on the inside or chilling on the outside. Internal temps are regulated by circulating air while you're moving and trapping heat inside down cubes when you stop. What does that mean? You won't overheat on high-altitude, high-pulse hikes when you'd typically be shedding layers, and you'll stay warm even when you're catching your breath in the thick of the backcountry powder. If snow or rain isn't in the forecast, rock the Alt HB standalone as a heat-pumping, ultra-breathable outer option. Features: 3D WarmCube technology circulates heat while you move and traps heat in down cubes when you come to a halt for apatable temperature-regulating comfort to cover a wide range of stop-and-go outdoor activities 700-fill-power down is specially treated with Down Defender for soft lofty warmth and lightweight compactability with extra water-resistant, quick-drying protection that stays drier 10x longer than untreated down Elastic bound cuffs and hem add versatile adjustability and comfort and a classic, casual look to your jacket Attached, full-coverage hood with elastic binding keeps your head, face, and neck protected from windy, wet, and cold conditions Zippered chest and hand pockets offers secure, convenient on-the-go storage for your everyday essentials Gusseted underarm design maximizes freedom of movement so you can use your full range of motion without compromise