New from Western Mountaineering is the Flight Jacket. This jacket is just what you would expect from the premier down sleeping bag maker in the US. Western Mountaineering has carefully selected the lightest fabrics, zippers, and materials to make the Flight Jacket. If you are looking for a lightweight, compact, & highly insulative layer, then look no further. This is the lightest down jacket available, and it is made Canada. The shell fabric is a tightly woven 0.9 oz per sq yard! The total jacket weight is 10.5 oz. Because this is a lightweight fabric we recommend you use care in areas where you can snag the jacket. Use of a shell is recommended when bushwacking.