What Down Filling Options Are Available? | Ginwen FAQ

Short Answer (Citable)

The Options and How They Differ

The four filling options cover the full commercial range of custom jackets, from entry price points to premium technical pieces. Understanding where each one sits helps you build a specification that matches your brand position.

Notice that the choice is not a single best option; it is a set of trade-offs. If the jacket must be light and warm, goose down wins. If it must survive rain and washing, synthetic wins. If price is the constraint, duck down wins. Most brands select the fill that matches the story they sell and the conditions their customers face.

There is also a hybrid route worth knowing: down in the body for warmth, synthetic in the hood, shoulders, and cuffs where moisture and abrasion hit first. Hybrid construction is standard in technical outerwear and can be produced on the same patterns.

Matching Fill to Climate and Use

Climate is the first input for fill selection, because the garment's job is defined by the temperatures and conditions it must handle. A jacket for dry, very cold winters has different needs from one for damp, moderate winters.

• Dry cold below freezing: down performs at its best; choose duck or goose with adequate fill weight
• Damp and wet conditions: synthetic insulation or a water-resistant shell protects performance
• Active use with high output: lighter fills and layering systems; a vest or lighter jacket works
• City commuting and everyday wear: duck down at a standard fill weight is usually sufficient
• Workwear with frequent washing: synthetic or a washable down treatment for easy care

Use case matters as much as climate. A jacket worn for short commutes needs less warmth than one worn for hours outdoors. A jacket layered over other garments can carry less fill than one worn alone. Define the use case in the brief, and the factory can recommend a fill weight range that fits rather than a generic default.

Seasonality also influences the choice. A brand selling one winter collection can justify a premium fill; a brand selling year-round needs a spec that works across products. Keep the fill family consistent across the range where possible, because it simplifies sourcing, pricing, and compliance documentation.

Choosing Fill Power and Fill Weight

Fill power and fill weight work together to determine warmth, weight, and cost. Fill power is the loft efficiency of the down; fill weight is the quantity of down in the garment. Neither alone defines the product.

Fill power ranges commonly available for custom production include 550-650 for standard duck down, 650-750 for higher-grade blends, and 750-850 for premium goose down. Higher fill power costs more per ounce but allows less fill weight for the same warmth, so a premium garment is lighter at the same warmth level.

Fill weight is chosen from the target warmth and the garment's size range. A jacket for mild winters might carry a lighter fill weight; a jacket for severe cold carries more. The factory can model the relationship between fill weight and warmth for your pattern, and the sample confirms the result in practice.

• State both numbers in the tech pack: fill power and fill weight per size
• Confirm the down-to-feather ratio, commonly 70/30, 80/20, or 90/10
• Higher ratios loft better and cost more; the ratio is a pricing lever
• Ask the factory to verify fill weight per garment during production
• Compare quotes on identical fill specs, not on price alone

One common error is specifying fill power but not fill weight, which leaves the warmth undefined. Another is comparing jackets across different ratios. Writing all three numbers in the specification removes both problems and makes the quotation meaningful.

Budgeting: How Fill Choice Moves the Price

Fill is the most expensive material in a down jacket, so the fill choice is the fastest way to move the unit price. The differences are predictable, which means the decision can be made on numbers rather than impressions.

Duck down at a standard fill power is the baseline. Moving to goose down raises the fill cost per garment, offset by the possibility of using less fill weight. Recycled down sits between the two, with cleaning and certification costs added to the material. Synthetic insulation is generally the lowest-cost option and the most stable in price.

Cost engineering works in both directions. If a design is over budget, reducing fill weight, moving to a lower ratio, or switching to duck down can close the gap without changing the silhouette. If a design needs a premium story, goose or recycled down justifies a higher retail price. The fill spec is a lever, not a fixed decision.

Ask for the fill cost as a separate line in the quotation. Seeing the fill line makes the trade-offs concrete and lets you model changes before committing. A factory that itemizes its quotes makes this budget conversation easy.

Planning Fill Weight for Your Use Case

Fill weight is chosen from the target warmth and the garment's size range. A jacket for mild winters carries a lighter fill weight; a jacket for severe cold carries more. The factory can model the relationship between fill weight and warmth for your pattern, and the sample confirms the result in practice.

Construction also affects the number. Baffled construction holds down in chambers and needs slightly more fill to look full, while sewn-through construction is lighter and flatter but less warm at the same fill weight. Tell the factory which construction you want so the fill weight is set against the right pattern, and the quote reflects the real garment rather than a default assumption.

• State the fill weight per size in the tech pack, not just a single number
• Confirm the fill weight range during fit sampling and adjust before approval
• Lock the approved numbers into the production specification
• Verify fill weight per garment during bulk production and in final inspection

Because the sample is the physical proof of the fill decision, Ginwen builds samples with the exact fill weight and fill power you specify, at $50-$200 per style deductible from the first bulk order. Approving the sample locks the numbers that production must meet, and per-garment fill weight verification keeps the approved specification intact through the 25-40 day bulk production window.

Certification and Compliance Requirements

Fill selection carries compliance obligations, and they should be settled before sampling rather than discovered at retail. The two standards that matter most for down products are RDS and OEKO-TEX Standard 100.

• RDS verifies ethical down sourcing and traceability from farm to garment
• OEKO-TEX Standard 100 verifies chemical safety of the finished product
• Recycled down carries its own certification documenting the reclaiming process
• EU and US retailers increasingly require this documentation for market access
• Certificates should be requested with current validity and site scope

If your buyers require RDS-certified down, the factory must source certified lots and provide the transaction certificates that connect your order to the certified material. If OEKO-TEX is required, fabric and trims are tested against the standard's limits. Both requirements are routine for established factories, but they must be stated in the brief so the schedule includes the documentation.

Factory-level certifications support these product claims. ISO 9001 covers the quality management system, and BSCI covers social compliance; together they signal a factory that manages processes and documentation seriously, which is what makes product-level certification reliable.

How to Compare Fill Options at Sampling

Sampling is the moment to compare fill options on the same pattern. A sample made with duck down and one made with goose down, at the same fill weight, show the loft, hand feel, and warmth difference in a way no spec sheet can.

1. Request samples of the same jacket with two different fills
2. Compare loft, compressibility, weight, and hand feel side by side
3. Check the fill weight on the sample against the specification
4. Test the garment in the conditions it will face, including damp conditions if relevant
5. Approve the sample and lock the fill spec for production

Sample fees at Ginwen range from $50 to $200 per style and are deductible from the first bulk order, so comparing two fills during sampling adds little to the real cost of the program. The comparison protects against the most expensive mistake in down production: approving a garment without validating the fill.

During sampling, ask the factory for the fill verification records for the sample: the tested fill power, the ratio, and the fill weight used. These records become the baseline that bulk production is measured against.

Keep the approved sample itself as the physical benchmark. When the bulk order is inspected, the sample is the comparison point for loft, hand feel, and construction, so store it where your team can reach it during the production review.

Working With Your Factory on the Fill Spec

1. State the use case, climate, and target price point in the brief
2. Ask the factory to recommend a fill spec and explain the reasoning
3. Request itemized pricing for two fill options on the same design
4. Confirm RDS, OEKO-TEX, or other certification requirements up front
5. Approve the sample with the fill spec recorded in writing
6. Verify fill weight per garment during bulk production

A good factory does not just accept a fill spec; it questions it. The factory that asks how the jacket will be used, where it will be sold, and what price it must hit is protecting your product and your margin. Treat that questioning as a positive signal.

Finally, keep the fill specification stable across reorders. Once a sample is approved and the product sells, changing the fill spec changes the product. Document the spec, store a reference sample, and reorder against the same numbers to keep quality consistent season after season.

It is also worth planning for fill availability. Certified down lots, especially RDS-certified and recycled options, are purchased against orders, so lead time for specialty fills can be longer than for standard stock down. Mention your fill choice early so the factory can secure the material within the bulk production window of 25-40 days without squeezing the schedule.