Fill power is a measurement of down quality that indicates how much space one ounce of down occupies in cubic inches. A rating of 800 means one ounce fills 800 cubic inches of space.

Higher fill power down provides better insulation with less weight. It creates more air pockets that trap warmth while remaining lightweight and compressible.

Quality down starts at 600 fill power. Premium products range from 700-900 fill power, offering exceptional warmth-to-weight ratio and long-lasting loft.

Not necessarily. Fill power measures quality, not warmth. A comforter's warmth depends on total fill weight. Higher fill power means you need less down to achieve the same warmth.

Down is placed in a graduated cylinder and compressed with a standard weight. After 24 hours, the volume it occupies determines the fill power rating.

Down cluster size, maturity, and origin impact fill power. Larger, mature clusters from cold-climate geese typically achieve higher ratings due to superior loft and resilience.

800 fill power offers premium quality with exceptional loft and durability. It provides superior comfort with less bulk, making it ideal for luxury bedding that lasts years.