Arcteryx Cerium Hoody Jacket is a lightweight, packable down hoody engineered as a midlayer for alpine climbing and backcountry use, offering an exceptional warmth-to-weight ratio. Key attributes: Black sapphire | Nylon | Lightweight with high warmth-to-weight ratio | Compressible and packable | Water-resistant (DWR finish) | Wind resistant | Breathable | Adjustable insulated StormHood compatible with helmet | Two zip hand pockets and internal zip security pocket | Adjustable hem cord | Elastic cuffs | Included stuff sack for compression | Full front zip | Trim fit | Quilted baffle construction | Streamlined silhouette for layering | Articulated patterning for mobility | Dimensions fit: Trim fit — streamlined for layering | Composition care: Outer: Nylon (Arato 15D) | Lining: Nylon (Arato 20D) | Insulation: 850-fill goose down (90% down, 10% feathers) | Synthetic insulation: Coreloft (polyester) | Machine wash warm (30°C). Do not use fabric softener. Tumble dry low to restore loft. Do not iron.