Down Duvets & Comforters: A B2B Sourcing Guide to Fill, Shell & Thread Count

Down duvets (down comforters) are a high-value addition to any wholesale bedding range — but quality varies widely, and most of it comes down to two things: the fill and the shell. Here's what B2B buyers should specify.

The fill: warmth without weight

Down delivers exceptional warmth-to-weight, loft and breathability. Higher fill power means more loft and insulation per gram, so the duvet is warmer yet lighter. Specify your target warmth level (all-season, summer-light or winter-warm) and fill content up front.

The shell makes or breaks it

A premium shell is what separates a luxury duvet from a leaky one. Look for a high-thread-count 100% cotton shell — for example an ultra-fine 180s / 800TC construction — woven densely enough to be down-proof so the fill stays put. A lightweight (around 95 GSM) but tightly woven casing keeps it soft and breathable.

• 100% cotton shell for breathability and a soft hand.
• High thread count (e.g. 800TC) and dense weave = down-proof.
• Baffle-box or sewn-through construction to control loft distribution.
• Reactive-dyed or natural shell for clean, fast colors.

All-season and customization

Offer warmth tiers and full sizing so retailers can merchandise summer, all-season and winter weights. Factory-direct production lets you customize fill weight, shell color/print, sizing and packaging from a 100-piece MOQ.

Compliance

Ask for OEKO-TEX certification and, where required, down-content and origin documentation so the product clears customs and meets retailer standards.

BeddingTextilePro is a Nantong B2B supplier of bedding sets, summer quilts and hotel linen on source-factory direct supply — locked, dedicated production lines at large-scale Nantong mills, goods shipping direct from the mill — with a 100-set MOQ, full OEM/ODM customization and OEKO-TEX support. Request a wholesale quotation and our export team will reply within one business day.

Frequently asked questions

What shell should I specify so a down duvet doesn't leak fill?

Specify a high-thread-count 100% cotton shell — for example an ultra-fine 180s / 800TC construction — woven densely enough to be down-proof, ideally around a lightweight 95 GSM so it stays soft and breathable while holding the fill.

What does fill power actually tell me about warmth?

Higher fill power means more loft and insulation per gram, so the duvet is warmer yet lighter; specify your target warmth level — summer-light, all-season or winter-warm — and the fill content up front.

Can I offer multiple warmth weights and customize the duvet?

Yes. Factory-direct production lets you offer summer, all-season and winter warmth tiers and customize fill weight, shell color or print, sizing and packaging from a 100-piece MOQ.

What compliance documents do down duvets need for export?

Ask for OEKO-TEX certification and, where required, down-content and origin documentation so the product clears customs and meets retailer standards.

Sources & references

1. 1.Textile Exchange - Responsible Down Standard (RDS)
2. 2.IDFL - International Down and Feather Testing Laboratory
3. 3.OEKO-TEX STANDARD 100 - textile harmful-substance testing
4. 4.FTC - Down...But Not Out: Advertising and Labeling of Feather Down