Duck Down vs Goose Down: Fill Power & Selection Guide

White Duck Down vs White Goose Down

Goose down generally reaches higher fill power than duck down, because geese are larger birds that produce larger, more resilient down clusters. At comparable fill power ratings, however, the practical performance difference between the two narrows significantly — a 700 fill power duck down and a 700 fill power goose down provide essentially the same warmth per weight, since fill power itself is the standardized measure of loft regardless of species.

Where the two diverge more consistently is at the premium end of the range: goose down more easily achieves very high fill power ratings (800+), while duck down's practical ceiling tends to sit somewhat lower. Goose down is also generally regarded as having a milder natural odor before processing, though thorough washing largely equalizes this difference in finished products from reputable suppliers.

Duck Down vs Goose Down: Full Comparison

For most consumer bedding and outerwear applications, the practical choice comes down to budget versus target fill power rather than species preference — duck down at a given fill power performs comparably to goose down at the same rating, at a generally lower cost.

What Is Fill Power in Down Products

Fill power measures the volume, in cubic inches, that one ounce of down occupies after being fully lofted under standardized test conditions. It is the primary indicator of insulating efficiency — a higher fill power means the down traps more air per ounce, so a garment or comforter can use less down by weight to achieve the same warmth as a lower fill power product using more material.

Fill power should always be evaluated alongside total fill weight, since the two together determine actual warmth: a lightweight jacket with 800 fill power down and a heavier jacket with 550 fill power down could provide similar total warmth, just packaged very differently in terms of weight and bulk.

How to Choose Down Filling Material

• Match fill power to intended use: lower fill power (550–650) suits everyday jackets and comforters; higher fill power (700+) suits ultralight outerwear and expedition-grade gear
• Check down content percentage, not just fill power — a blend with more feather content will feel and perform differently even at the same fill power rating
• Consider species based on budget and target performance — duck down offers strong value at mid-to-high fill power, goose down suits premium, very high fill power applications
• Verify cleanliness and certification — turbidity and oxygen number test results indicate proper processing regardless of species or fill power
• Match to climate and use case — total fill weight and garment/bedding construction matter as much as fill power for real-world warmth

Best Down Filling for Jackets and Bedding

Jackets and bedding place different demands on down fill, since one prioritizes packability and warmth-to-weight while the other prioritizes loft, drape, and long-term durability under repeated compression from sleeping.

For winter jackets, 600–800 fill power down offers a strong balance of warmth, compressibility, and cost, with higher fill power favored for technical outdoor and expedition wear where pack size and weight are critical. For pillows and comforters, down content percentage and cluster quality often matter as much as fill power, since bedding is compressed and decompressed nightly over years of use — durable, high-content down holds loft longer under this repeated cycling than lower-content blends.

Premium Duck Down Filling

Premium duck down sits at the upper end of the quality spectrum on every measurable factor: high fill power (typically 700+), high down content percentage (often 90%+), low turbidity indicating thorough cleaning, and minimal residual odor. These products typically carry lab certification documenting fill power, down content, and cleanliness, rather than relying on marketing claims alone.

Premium-grade duck down is generally reserved for higher-end bedding and technical outerwear, where the combination of superior loft, softness, and long-term durability justifies the higher cost relative to standard-grade fill. Buyers sourcing at this tier should request specific test reports rather than relying on general quality claims, since fill power and down content can vary meaningfully even within products marketed as "premium."