We know you’re out there0 the woman who wants the ability to precisely dial in her layering system, wants core warmth with a minimum of bulk, and demands versatility from her core wardrobe. The Arc'teryx Cerium Women's Vest is built for you. Whether you’re putting this over your autumn flannel and sweater layers to go out and kick leaves, or stacking it under your shell to keep your core comfortable in the dead of winter, this is a flexible, airy, packable, layer that rounds out your wardrobe with just the right amount of feathery insulation where you need it.. around your core. A wind and water resistant shell, 850 fill power down, and so compressible it comes with its own stuff sack, if you’re looking for a down vest, look no further than this tailored piece built for layering.