Arc'teryx Cerium

The Cerium Jacket is a lightweight, highly packable insulated jacket designed for alpine missions and backcountry adventures. It combines responsibly sourced 850 fill European white goose down with Coreloft™ synthetic insulation in moisture-prone zones, delivering exceptional warmth for its weight while maintaining performance when conditions turn damp. The recycled 15D Arato™ nylon shell is light yet durable, and the bio-derived 20D liner reduces reliance on petroleum-based materials.

The trim, articulated pattern moves with the body and layers cleanly under a shell, while the insulated collar, stretchy cuffs, and adjustable hem keep warmth in and drafts out. The jacket is wind resistant, treated with an FC0-DWR finish, and compresses into its included stuff sack for easy transport. From cold-weather resort days to high-output backcountry tours, it balances comfort, breathability, and packability.