Arc'teryx Cerium LT Jacket delivers exceptional warmth-to-weight ratio in a streamlined design. This technical down layer features a premium 850-fill grey goose down insulation for superior loft and compressibility. The durable Arato 10 nylon shell provides wind resistance and light moisture protection, while the Coreloft synthetic insulation is strategically placed in moisture-prone areas. Designed with a full front zip, stand-up collar, and two zippered hand pockets, it functions perfectly as a mid-layer or standalone piece in cool, dry conditions.