Tough, light-weight shell with a Deluge® DWR finish 800-fill-power premium European goose down for low-bulk warmth Quilt pattern controls movement of down for optimal warmth Minimal silhouette with a 1/4-zip reduces weight Thermally efficient under a shell or as a stand alone layer Self-fabric stuffsack Insulated with Traceable Down (non-live-plucked, non-force-fed birds)