Our FillsOur down comforters are available in your choice of our most popular 650 fill power European white goose down or our finest 750 fill power hand-harvested Hungarian white goose down. Down is the fluffy, delicate undercoating of a goose. The ability of down to loft, or to fill a given volume of space, is called fill power. Fill power is measured in cubic inches of volume.
One ounce of 650 fill power down (650 WGD), will loft to fill a volume of 650 cubic inches. Fill power ranges from about 500 to 800 for special types of white goose down. Thus, in order to achieve maximum "warmth without weight", we recommend at least a 650 fill power down. Feathers have little insulating ability because they do not have the same lofting characteristics of down.
Our hand selected 750 fill white goose down (750 WGD) has approximately 15 percent more warmth than our 650 fill power down. It is specially washed, dried, and sorted to our specifications in the United States as our assurance of final quality.
For what is perhaps the world's finest comforter, see our Silk Covered Down, using rare 800 fill power white goose down (800 WGD). It is specially washed, dried, and sorted to our specifications in the United States as our assurance of final quality. All DeWoolfson fills are guaranteed to be of European origin.
Be careful in selecting a very warm comforter. Our experience is that many people are truly surprised at how much heat a comforter retains.