Whether for casual knocking around this fall, or as an addition to your midlayer on a bitter day, the Arc'teryx Cerium Men's Vest is fluffy, cozy, down insulated warmth in a packable little vest. Filled with 850 fill European white goose down with a Down Composite Mapping™ strategy that places Coreloft™ synthetic insulation in areas likely to get damp, this has a wind resistant and water resistant 15D Arato™ outer shell, for a vest you can wear confidently into a misty day, and rack up the runs with under a shell without worrying. So packable it ships with its own stuff sack this is the piece for a man who wants core warmth with flexibility, a piece you can pop over a midlayer and under a shell on a bitter day, or drop in your pack for a break at the summit whether you’ve skinned, boot packed, or hiked your way up there. The vest you won’t leave home without.