Cerium Vest Women's is a light, warm down vest designed for hiking and trail running, built for use as an alpine midlayer or standalone layer in cool, dry conditions. Product Type: Women's insulated down vest Material: Down Fill 850 fill responsibly-sourced down with Coreloft™ synthetic insulation in moisture-prone areas Recycled 15D Arato™ nylon outer for low weight and durability Streamlined fit to layer under a shell, plus an included stuff sack for compact transport For hiking and trail running layering, pair it with a women's shell jacket and a beanie . Weighing just grams and packing smaller than a grapefruit, the Cerium Vest performs as a minimalist’s alpine midlayer or standalone in cool, dry conditions. Responsibly-sourced 850 fill down – with Coreloft™ synthetic utilized in areas prone to moisture – provides premium insulation, and the recycled 15D Arato™ nylon outer is light and durable. Streamlined in its design, it layers comfortably under a shell and easily fits into its included stuff sack for compact transport.