Goose down costs more because the clusters are larger. Goose down clusters are generally larger than duck down clusters, with longer fibers and more resilience. Larger clusters trap more air, so goose down reaches the higher fill powers.
At the same fill power, the two insulate in the same way. The difference is how high the fill power goes, and what that grade costs. A goose down comforter is not a heavier one.
Haven
Effortless comfort, every night.
Filled with 95% white duck down and 800 fill power, Haven delivers exceptional loft, lightweight warmth, and breathable comfort. Hand-filled and sewn as a 3D baffle-box construction, it is crafted to stay lofty, balanced, and beautifully soft night after night.
Light as air. Warm when you need it. Made for better sleep.
Premium white goose down at 850 fill power, for an elevated night. Remarkable loft, lightweight warmth, and natural breathability. Hand-filled and sewn as a 3D baffle-box construction so the down stays even, inside a soft-touch shell.
Same weight. Higher loft. More refined. Made for truly restful nights.
The pinnacle of the collection. 98% white goose down at 900 fill power, the loftiest of the three, at the same fill weight. Hand-filled and sewn as a 3D baffle-box construction to keep that loft through the night.