Arc'Teryx Men's Cerium LT Jacket - Ideal for urban winter activities, ski-touring, backcountry trekking, and more, the Arc'Teryx Men's Cerium LT Jacket can be used as a mid-layer or standalone in cold, dry weather. Resilient and packable, this jacket with an Arato 10 nylon shell delivers lightweight durability with a DWR finish.