Worn as a mid-layer or standalone piece in cool, dry conditions, the Cerium LT Jacket delivers exceptional warmth for little weight. Premium 850 fill down is resilient, lofty and warm. The Arato™ 10 shell provides lightweight durability, and Down Composite Mapping™ strategically places Coreloft™ synthetic insulation in moisture-prone areas. Articulated construction moves with the body, and sewn-through construction is used to further reduce weight and increase packability. Highly efficient natural insulation that compacts well and offers excellent warmth to weight. Versatile high-performance designs for diverse activities and conditions. High performance, minimalist design that is durable for its weight. Streamlined, minimalist and lightweight technical down insulation. High warmth to weight ratio.