If all else fails removing the odor I wouldn't hesitate washing and eliminating odorrs of any of my down gear including down pieces that are high FP and of very light denier fabrics(7D). Use a quality Down Wash like made by Nikwax or McNetts (I prefer the McNetts since to me it leaves less of a film/feeling in/on the face fabric, ie; it washes out better)and use the amount suggested of McNetts Mirazyme IF you have mildew odor issues. Use a front loading washer on gentle cycle as per many qualified directions given online and dry on low heat. And more low heat. And more low heat. I used to think washing down pieces required brain surgery like washing techniques. You shouldn't be fearful of washing down pieces once you inform yourself.