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