This is one awesome piece of outerwear from F/X Fusion. The vest is feather light yet will keep you warm due to 90% down filler. It is easy to pack and even comes with its own bag and folds up very easily. Lastly, it looks great! Shell: 100% Nylon Lining: 100% Polyester Fill: 90% Down/10% Feather. Machine Wash. Imported.