The Cerium is a go-to for virtually any alpine undertaking. Taking it higher, they refined the design and sourced more sustainable materials while maintaining its exceptional warmth-to-weight ratio and packability. Responsibly-sourced 850 fill down – with Coreloft™ synthetic utilized in areas prone to moisture – provides premium insulation. The outer, recycled 15D Arato™ nylon with dope-dyed yarns, is light and durable. An insulated StormHood™ extends the warmth, and the streamlined ergonomic fit layers easily.