Toasty warm in a layerable piece this 850 fill European white goose down vest provides exceptional warmth in a light package, coming in at only 170 packable grams. The Arc'teryx Cerium Men’s Vest is a core outdoor wardrobe essential, the layer over a flannel on a crisp day, the core warmth you need under a winter shell, and the piece in your pack for protection at the summit. Designed to fit without bulk under a shell with room for layering underneath this is built for staying warm when you’re putting out the energy in the cold. With Down Composite Mapping™ Arc’teryx has put Coreloft™ synthetic insulation in areas prone to moisture for a consistent performance out in the field, this synthetic breathes, dries quickly, compresses and bounces back endlessly, but most importantly, continues to keep you warm even if damp. Articulated patterning for movement, zip hand pockets and an internal security pocket, this vest is four season practicality, and an essential piece of a core wardrobe, all wrapped up in a nice light package.