TL:DR
Wool-filled duvets and bedding suit ranges that sell on temperature regulation, moisture management and natural fire resistance; wool insulates when cold, breathes when warm, and absorbs roughly 30 percent of its weight in moisture without feeling damp. Spec fill weight by GSM rather than tog, grade the wool, and require Woolmark, GOTS, RWS or OEKO-TEX certification.
Wool fill regulates temperature, resists fire naturally and is measured by GSM rather than a fixed tog. Here is how a wholesale buyer grades the wool, specs the fill weight, chooses certifications and writes an order that reads like a spec sheet.
Wool is the fill to reach for when the selling points are temperature regulation, moisture management and natural fire resistance. It actively balances warmth — insulating when it is cold, breathing and wicking when it is warm — absorbs up to around 30% of its own weight in moisture without feeling damp, and is naturally flame-resistant, dust-mite resistant and biodegradable. The trade-offs are real: it is heavier and bulkier than down, usually not freely machine-washable, and mid-to-high in cost. For a wholesale order, wool is specified by fill weight in GSM, not a fixed tog.
Why wool works as a fill
Wool's crimped fiber traps air while its structure moves moisture: a hydrophilic inner cortex pulls water vapor off the skin and a hydrophobic outer cuticle releases it to the air, so a wool duvet buffers humidity instead of holding a single fixed insulation value. That makes it a strong fit for hot sleepers and variable climates. It is also naturally hostile to dust mites, mold and mildew, and it is a renewable, biodegradable protein fiber.
The fire performance is a genuine contract-market advantage. Wool ignites only at around 570–600°C — far higher than cotton or polyester — and has a limiting oxygen index of about 25–26, so in normal air it struggles to sustain a flame. Instead of melting and dripping like polyester, it chars and self-extinguishes, forming an insulating char layer. The property is inherent to the keratin fiber and permanent, not a chemical finish that washes out, which is why hotel and contract buyers under fire regulations value it.
| Wool | Down | Microfiber | |
|---|---|---|---|
| Warmth style | Actively regulating — warms when cool, cools when warm | Insulating — traps a fixed amount of still air | Insulating — traps air, less breathable |
| Moisture handling | Absorbs ~30% of its weight without feeling damp; wicks vapor | Poor once damp; can retain moisture and odor | Low absorbency; can feel clammy |
| Weight / feel | Heavier, denser; drapes close to the body | Lightest and loftiest; very soft | Light; soft but less breathable |
| Washability | Usually spot- or dry-clean; only washable wool takes a cold cycle | Machine-washable with care; must dry fully | Easily machine-washable; low-maintenance |
| Flame resistance | Naturally resistant: chars and self-extinguishes | Flammable; no inherent resistance | Melts and can drip; petroleum-based |
| Allergies | Naturally dust-mite and mold resistant; low-allergen | Can harbor dust mites if unwashed | Hypoallergenic; resists dust mites |
| Biodegradable | Yes — natural, renewable protein fiber | Yes — natural fiber | No — synthetic (petroleum-based) |
| Relative cost | Mid–high (usually below premium down) | Highest (high-fill-power goose) | Lowest |
| Best use | All-season comfort; hot sleepers; fire-conscious hotels | Cold, dry climates; lightweight warmth | Budget lines; easy-care high-turnover volume |
Grading the wool — and pricing it
Wool grade is driven by fineness, measured in microns: merino is the finest and softest (indicatively around 17–24 microns), lambswool is soft first-shearing fleece, and standard crossbred wool (around 28–35 microns) is coarser, more resilient and cheaper for value fill. Alpaca is a warm, light, low-lanolin niche premium option. Treat micron bands as indicative for framing grade against cost rather than as a fixed classing standard, and set the fineness you want in the tech pack.
Fill weight by season — wool uses GSM, not a fixed tog
Wool duvets are sold by fill weight in GSM: roughly 150–300 g/m² for a light or summer duvet, 300–500 for all-season, and 500–800 for winter, with three-in-one systems that snap two layers together. Because wool breathes, it does not carry a fixed tog — any tog figure is an equivalency, not a certified rating (very roughly, 400–500 g/m² behaves like 7–9 tog). Make the GSM the contractual number, with a tolerance of about five to ten percent, and quote tog only as an approximate guide.
Certifications, decoded for a buyer
Four marks answer four different questions, and one is not a substitute for another. Match the certificate to the claim you need to make.
| Certification | What it certifies | Why it matters to a buyer |
|---|---|---|
| Woolmark | Wool fiber content, quality and authenticity — composition, durability, laundry performance and colorfastness | Independent proof the wool is genuine and meets spec; protects against mislabeled or under-spec fill |
| GOTS | Organic fiber content plus processing across the chain ('Organic' ≥95%, 'Made with organic' 70–94%), with chemical and social criteria | Required for a credible organic claim; covers chemistry and ethics from farm to finished product |
| RWS (Responsible Wool Standard) | Animal welfare (mulesing banned), land management and social conditions, with certified chain of custody | Answers animal-welfare and ethical-sourcing due diligence for retailers and brands |
| OEKO-TEX STANDARD 100 | Chemical safety — every component tested against 1,000+ harmful substances | Assures the finished product is safe for skin contact — key for bedding and children's or hotel lines |
Washability is a contract term, not a lifestyle tip
This is where returns come from, so pin it down. Standard carded wool batting should be labeled spot-clean or dry-clean only; only thermally-bonded washable wool survives a cold wool or delicate cycle, and even then with no spin, no agitation and low or no tumble-dry — often a commercial machine, because wet wool is heavy. Wash it wrong and it felts and shrinks. Wool's self-cleaning nature means it rarely needs washing anyway; airing and sunning refresh it. Confirm the correct care claim on the pre-production sample before you print a single label.
How to spec a wool duvet order
From fleece grade to accepted bulk
- 01
1 · Choose wool type/grade and season
Merino or fine wool for premium and soft hand, standard crossbred for value; pick the season target — summer, all-season or winter.
- 02
2 · Set fill weight (GSM) with tolerance
Specify GSM per season tier (for example 250 / 400 / 550 g/m²) with an agreed tolerance of about 5–10%. Remember tog is only an equivalency for wool.
- 03
3 · Choose shell and quilting
A cotton shell with defined thread count in a wool-proof weave, plus channel (baffle) or box/diamond quilting so the batting cannot migrate or clump.
- 04
4 · Require the right certifications and a fill test
Add Woolmark for quality and authenticity and, as needed, RWS for welfare, GOTS for organic and OEKO-TEX STANDARD 100 for chemical safety; require a fiber-content and fill-weight lab test on samples.
- 05
5 · Sample, then bulk with AQL
Approve a physical pre-production sample — weigh the fill, check the quilting, run the care test — lock the spec, then run bulk with AQL inspection against the approved sample.
Wool sells on regulation and fire safety, but it ships on two contract lines competitors leave vague: the fill weight in GSM with a tolerance, and the exact washability claim, both signed off on the sample.
Sourcing wool duvets factory-direct
BeddingTextilePro supplies wool duvets and wool-filled bedding factory-direct from Nantong, China — merino and standard wool fills specified by GSM, in wool-proof cotton shells with channel or box quilting, at a 100-set minimum per color and size combination with full OEM/ODM and Woolmark, RWS, GOTS and OEKO-TEX STANDARD 100 support on request. Send your season, fineness and certification needs and our team will spec the fill and quote within one business day.
Frequently asked questions
- How do we specify warmth if wool has no fixed tog rating?
- Specify fill weight in GSM per season, plus a tolerance. Wool breathes, so it has a fluctuating tog equivalency rather than a fixed tog. Use GSM as the contractual number and quote tog only as an approximate guide — for example, around 400–500 g/m² behaves like 7–9 tog.
- Can we sell wool duvets as 'machine washable'?
- Only if the fill is thermally-bonded washable wool, and even then care is limited — a cold wool or delicate cycle, no spin, no agitation, low or no tumble-dry, often a commercial machine. Standard carded batting should be labeled spot-clean or dry-clean. Confirm the correct care claim on the sample before printing labels, or you risk felting complaints and returns.
- Which certification proves the wool is genuine and good quality?
- Woolmark — it independently tests fiber content, durability, laundry performance and colorfastness. For organic claims use GOTS; for animal welfare and ethics use RWS; for chemical safety use OEKO-TEX STANDARD 100. They answer different questions, so do not treat one as a substitute for another.
- Is wool fill actually a fire-safety advantage for hotel and contract orders?
- Yes. Wool is naturally flame-resistant — it ignites only around 570–600°C and has a limiting oxygen index of about 25–26 — so it chars and self-extinguishes instead of melting and dripping, and the property is inherent and permanent. It is a genuine selling point for contract buyers, though you should still confirm compliance with the destination market's specific fire regulations.
- What construction details stop the fill shifting and clumping?
- A wool-proof, tightly woven cotton shell plus channel (baffle) or box/diamond quilting to hold the batting in place. Specify the shell weave and thread count and the quilting pattern in the tech pack, and verify both on the pre-production sample.
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