evo.com | Arc'teryx Down > Brr! The Arc'teryx Cerium Jacket is ready for the cold and long days in the backcountry. Packed with a combination of 850 fill down and Coreloft(TM) synthetic in key locations prone to moisture, it keeps your body temperature where it needs to be when it matters most. Packable and lightweight, the Cerium easily stuffs down into it's included carry sack. 850-Fill European White Goose Down Delivers exceptional warmth for its weight. Arato(TM) 20 100% Nylon - 60% bio-derived material, FC0 DWR Arato(TM) 15 100% Recycled Dope Dye Nylon Stuff Sack Included Fitted The trimmer fit is patterned to stay close to the body through the chest, waist, hip, and thigh. Its low profile eliminates bulk, moves with the body, and fits comfortably over first layers or under outer layers. | Women's Arc'teryx Cerium Jacket 2026 - Large Black | Nylon