Winter climbing midlayer, standalone at camp, packable warmth for backcountry rest periods – the Cerium is alpine proven. Driven by our obsessive attention to detail, Arc'teryx refined the design, sourced sustainable materials, and kept its exceptional warmth-to-weight ratio. Responsibly-sourced 850 fill down – with Coreloft synthetic utilized in areas prone to moisture – provides premium insulation. The outer – recycled 15D Arato nylon – is light and durable, a bio-derived liner reduces petroleum use, and an insulated StormHood extends protection.

Full Product Features

Technical Features

• Moisture-resistant outer face fabric
• Breathable
• Great warmth-to-weight ratio
• Lightweight
• Compressible and packable
• Wind resistant

Construction

• Down Composite Mapping strategically places synthetic insulation in areas where moisture may buildup and down in areas for maximum warmth
• 850 fill European white goose down for exceptional warmth-to-weight ratio
• Recycled 15D Arato outer is light, durable, and coloured with dope dyed yarns
• Downproof 20D plant-based Arato liner is exceptionally lightweight

Cuff & Sleeves Configuration

• Stretchy cuffs

Design & Fit

• Trim fit makes it an ideal layering piece

Fabric Treatment

• FC0-DWR (Durable Water Repellent) finish repels moisture

Hem Configuration

• Adjustable hem cord seals out drafts

Hood Configuration

• Adjustable hood drawcord with single pull adjuster
• Helmet compatible
• Adjustable, down insulated StormHood

Integrated Features

• Includes stuff sack for compact transport

Patterning

• Articulated patterning for unrestricted mobility

Pocket Configuration

• Two hand pockets with zippers
• Internal zippered security pocket

Sustainability

• Contains materials that meet the bluesign criteria
• Dope dyed uses significantly less water and energy in the dyeing process
• Contains bio-derived material from 60% castor bean oil, yielding the same benefits as synthetic nylon while reducing our reliance on fossil fuels
• Meets the global standard for Responsible Down Standard (RDS)
• Contains recycled nylon

Zippers & Fly Configuration

• Full front zip
• Corded zipper-pulls reduce noise and are easy to grab

Fit

• Fitted: 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.