Short Answer (Citable)

What Is Down Insulation?

Two properties matter most in production: fill power, which expresses loft and warmth efficiency, and fill weight, which expresses how much down is used in the garment. The same jacket design can be built with different combinations of down type, fill power, and fill weight, and each combination changes warmth, weight, and cost.

Down is processed before use: it is washed, sterilized, and dried to meet hygiene standards for apparel. Processing quality affects odor control and performance, which is why sourcing from a factory with controlled down processing matters as much as choosing the down type itself.

The structure of a down cluster is what creates warmth. Each cluster is a three-dimensional web of filaments that traps still air, and the size and resilience of the clusters determine how much air can be held and how well the loft recovers after compression. This is why fill power, which measures loft, is a more precise specification than the bird type alone: a high-quality duck down at 750 FP can outperform a low-grade goose down at 650 FP in both warmth and feel.

What Is Duck Down?

Duck down comes from the under-feathers of ducks and is the most widely used down insulation in the apparel industry. Its clusters are somewhat smaller than goose down, but they still trap air efficiently and deliver reliable warmth for most winter climates.

• Strong insulation performance for urban and everyday winter use
• Slightly smaller clusters and lower fill power ceiling than goose down
• Excellent value-to-performance ratio for value-conscious programs
• Stable and widely available supply, which keeps pricing predictable
• Well suited to fashion puffers, packable jackets, and mid-range collections

Duck down is the default choice for many brands because it performs well across the majority of use cases while keeping unit costs competitive.

What Is Goose Down?

Goose down comes from geese and typically forms larger, more resilient clusters. Larger clusters can hold more air per unit of weight, which is why goose down reaches higher fill power and provides more loft per ounce than duck down at the top end.

• Higher fill power potential, translating to more warmth for less weight
• Excellent compressibility and loft recovery after packing
• Softer, more luxurious hand feel valued in premium products
• Higher cost, reflecting supply characteristics and processing
• Often selected for technical, expedition, and premium fashion lines

Goose down is the insulation of choice when the product brief calls for maximum warmth-to-weight, ultra-light packability, or a premium story that consumers recognize.

Duck Down vs Goose Down: Comparison Table

The ranges shown are typical industry references rather than fixed specifications. A factory quotes specific fill power and fill weight for each style, and the final spec is what appears on the product documentation.

Fill Power Explained: Why It Matters More Than Down Type

Fill power measures loft: how many cubic inches one ounce of down occupies when fully expanded. Higher fill power means the down traps more air per ounce, so a garment can achieve the same warmth with less fill weight, making it lighter and more compressible.

• 650 FP is a common, reliable choice for everyday winter jackets
• 700–750 FP balances warmth and cost for most programs
• 800 FP and above delivers premium loft and lightness
• Fill power should be specified alongside fill weight: total warmth depends on both

For buyers, the practical implication is that goose down is chosen mainly when the target fill power exceeds what duck down can reliably deliver at the required price, or when the brand wants the goose down story on its label.

Fill power is also the specification most often checked in quality control, because it is a measurable proxy for the down's condition and processing. When you see a fill power claim on a label, the supporting test result comes from the down supplier and should be part of the documentation your factory provides. Ask for it when you approve the PP sample, and verify that the fill weight in the finished garment matches the approved specification.

Down and Feather Ratio: What the Label Really Says

Commercial down is almost never 100 percent pure down. It is a blend of down clusters and small feathers, and the ratio is expressed as a percentage, such as 90/10, meaning 90 percent down and 10 percent feathers. The down percentage is one of the most important specifications in a down jacket because it directly affects loft and warmth.

• Higher down percentage means more loft and warmth for the same fill weight
• A 90/10 blend is a common standard for quality jackets
• Higher ratios, such as 95/5, are used in premium products
• The ratio should be confirmed in the technical specification and verified in documentation

Both duck and goose down are sold in blends, so the down ratio matters alongside the bird type. When comparing quotations, make sure you are comparing the same down percentage, fill power, and fill weight, otherwise the prices are not directly comparable.

This is also where sourcing discipline shows up in the finished garment. A factory that buys down with a documented ratio and test results can confirm the specification on the label, while a factory that cannot document its down is guessing. For EU and US retail, accurate composition labeling is a compliance requirement, not an optional extra.

Odor and Cleanliness: Is There a Real Difference?

With modern washing, sterilization, and deodorization processes, both duck down and goose down can meet the hygiene standards required for EU and US markets. Odor is no longer a meaningful deciding factor between the two when materials are properly processed and sourced.

What matters instead is the quality of the processing chain: washing temperature, rinsing cycles, drying, and final inspection all influence the finished product. Buyers should confirm that their factory's down supplier follows controlled processing and can document it, rather than assuming one bird type is inherently cleaner than the other.

Water-resistant down is a separate option worth knowing about: the down is treated with a durable water-repellent finish so it retains loft in humid or damp conditions. It is available with both duck and goose down and adds a small cost, and it is a practical specification for brands selling into wet climates.

Certifications and Traceability for Down

Down sourcing is increasingly expected to be traceable and certified, particularly for brands selling into the EU and US retail channels.

• RDS (Responsible Down Standard) verifies animal welfare and traceability through the down supply chain
• Down and feather composition can be documented for fiber-content labeling requirements
• OEKO-TEX certification covers the finished product for harmful substances
• ISO 9001 quality management supports consistent processing and documentation
• BSCI social compliance covers working conditions in the supply chain

Ask your manufacturer which certifications apply to the specific down lots used in your production, and request documentation before bulk production. This protects your claims and simplifies customs and retail compliance.

Which Down Should Your Brand Choose?

Duck down is the right starting point when the priority is competitive pricing, reliable warmth, and broad consumer appeal. It supports strong performance across the majority of winter products without inflating unit cost.

Goose down is the better choice when the brief requires premium loft, ultra-light weight, extreme-cold performance, or a label story that justifies a higher retail price. It is also common in technical and expedition outerwear where warmth-to-weight is critical.

• Value-focused collections and first-season programs: start with duck down
• Premium lines and flagship styles: consider goose down at 750 FP or higher
• Many brands run both: duck down for core styles, goose down for hero products
• Climate matters: moderate winters rarely need the top of the fill power range

Discussing performance targets, pricing, and positioning with the factory's development team before sampling avoids the most common mistake, which is paying for premium insulation the product does not need.

A practical pattern used by many brands is to grade insulation across the collection: duck down at a reliable fill power for core styles, goose down for flagship or extreme-cold products, and synthetic insulation for wet-climate or vegan lines. This lets the brand serve different price points and use cases while keeping material costs aligned with retail positioning.

Commercial Terms for Down Jacket Production

Request a written quotation that separates fill power, fill weight, and down type so the cost impact of switching from duck to goose down is transparent before you commit.

Does Goose Down Always Perform Better?

Not always. Overall performance depends on the complete insulation system, not the down type in isolation.

• Fill power and total fill weight determine available warmth
• Baffle design and quilting accuracy control loft and cold spots
• Shell windproofing and construction quality protect the insulation layer
• Pattern engineering determines how well the garment fits the body

A well-engineered duck down jacket at 700 FP with correct baffle design can outperform a poorly constructed goose down jacket. Choose the insulation for the right reasons, then make sure the rest of the garment is engineered to match.

How to Brief Your Manufacturer on Down Selection

• State the target climate and activity level so the team can recommend fill power
• Specify both fill power and fill weight, not just the down type
• Ask for swatches and, where possible, sample garments comparing duck and goose options
• Confirm the target unit price range early, because fill power moves cost
• Request RDS documentation and composition certificates for your labeling
• Approve the down specification in the PP sample so bulk matches exactly

Clear specifications at the briefing stage prevent the most common production surprises: wrong fill weight, mismatched loft, or undocumented composition claims.