Michael P.wrote a review of Grangers Down Wash on November 9, 2013
Familiarity: I've used it once or twice and have initial impressions
I have a Marmot Hydrogen 30 deg down bag, it's about 5 years old, and I've used it on the AT for several section hikes over this last 5 years. Over this time, the bag has naturally lost some of it's loft and needed a good cleaning. I did some online research and reviewed Marmont's recommendations, and the Granger Down Wash was the recommended product for washing the bag, using a commercial front loading washer. After washing and drying the bag, it is like new condition, loft returned, and new smell. I highly recommend this product and also following manufacturer recommendations for washing and drying any down bag.