A minimalist down vest providing a high level of core warmth for very little weight, the Cerium LT performs as a midlayer or standalone in cool, dry conditions. Premium 850 fill down is resilient and warm, the Arato 10 shell provides lightweight durability, and Down Composite Mapping strategically places Coreloft synthetic insulation in moisture-prone areas. The trim fit layers easily under a shell, and the sewn-through construction further reduces weight and increases packability.